All this week on Newsround we're looking at the things that worry you, and lots of you say one of your greatest worries is your appearance.
But we want to know WHY kids worry about the way they look so much.
So, is it something that worries you, or are you happy with the way you look?
Do you or your friends worry about your bodies, or not having the right clothes or make-up?
And who do you think is to blame - skinny celebs, adverts in glossy mags, or pressure from friends?
Unfortunately this topic is now closed but there are Comments pages on other subjects on the main Chat index.
"NO! I am proud of the way I look and don't care about any other comments."
Erin, 10, Basingstoke, England
"I know that what is on the inside really counts, but sometimes I just wish with all my heart that my hair was long and blond, not short and brown and that I had lovely blue eyes, not hazel. Oh how I wish!"
Caroline, 9, London, England
"I worry about my appearance because you see all of these super-skinny celebs who are a size zero."
Elizabeth, 9, West Midlands, England
"I never worry about the way I look."
Billy, 11, London, England
"I'm worried about the injection we have to have in Year 10!"
Chris, 12, Somerset, England
"I think they are spending too much money on the looks of our school, but they don't worry about the resources that we need!"
Helena, 11, Portsmouth, England
"I feel fine, its just the way I am. I put a bit of makeup on but I never plaster it on, it will give you loads of spots!"
Chloe, 11, Rhyl, Wales
"I'm worried because some of the girls have started to wear make-up in school and I'm thinking should I?"
Beth, 10, Tyne & Wear, England
"See imperfections as perfections."
Ivy, 14, Wolverhampton, England
"I think some people wear too much make-up. They should only were a bit of make-up."
Milana, 9, County Antrim, Northern Ireland
"I like the way I look but I would like to look more like a celebrity."
Nicole, 8, Wirral, England
"Why should anyone exactly worry about what they look like? It's not looks that count."
Christina, 12, East Renfrewshire, Scotland
"I worry a lot about the way I look because people will tease me if I don't look good"
George, 10, Richmond, England
"I don't care what I look like because everyone is special and it doesn't have to be in their looks."
Amanda, 10, Manchester, England
"Yeah I do like to make myself look nice because when my hair isn't gelled I look nerdy so I try to make myself look good for everyday!"
Alfie, 10, London, England
"I don't really mind what I look like because looks don't matter and sometimes I don't use make-up to make me look pretty. I like the way I look!"
Mollie, 10, Oxfordshire, England
"I do not believe that the word "beautiful" is a look. To me it's a feeling. If you feel comfortable, nice or hot in the make-up or clothes you're wearing, that is what I call beautiful."
Stacey, 13, New South Wales, Australia
"I don't worry about the way I look. I care because when you look good, your self esteem and self confidence really raise. As long as I am clean and healthy, I am beautiful to me."
Liz, 14, New York, USA
"I don't worry about how I look. I think the most important thing is how a person sees himself. If a person thinks himself good, he will be really good."
Voky, 10, Taipei, Taiwan
"Sometimes I worry about my weight a little bit too much and can sometimes be a little conscious about it."
Chloe, 11, South Shields, England
"I used to worry about what people thought of me, but now I've learnt that if they can't see you for what is on the inside then they are not worth having as a friend."
Lauren, 12, Kent, England
"Usually I do really worry about how I look, but sometimes I just completely forget about it and let the wind carry me away without a care in the world!"
Lucy, 10, East Lothian, Scotland
"I think it's silly that people worry about the way they look, and I feel that it's all magazines fault as they make people in the magazine look better than they actually are in real life!"
Ross, 13, Edinburgh, Scotland
"Sometimes when I'm not with my friends, I do worry about the way I look, but when I'm with all my friends, I feel great!"
Ellie, 12, Surrey, England
"Yes I do worry because lots of girls at my school wear make-up and I feel I'm under pressure to do so too."
Emma, 11, Tewkesbury, England
"I do worry about the way I look. Everyone at school has really clear skin but I have loads of spots and they don't seem to go away."
Sian, 13, Nottingham, England
"I do make an effort to make myself look nice outside school by buying nice clothes but I do sometimes daydream... imagine if I was really pretty and what would I wear and ideally what would I look like?"
Lucinda, 11, England
"Me and my friends worry a lot about how we look. It's mainly because if there's a really skinny person in your class you're likely to want to be as skinny as them otherwise next to them you worry you will look fat."
Kim, 11, East Sussex, England
"No, I'm not that worried as long as I look fine I'm happy. But I do like putting make-up on and getting dressed up and making my hair in different styles."
Sarah, 13, Ilford, England
"I do worry about how I look and I can't leave the house to go to school without worrying about my hair and if my skirt is too short and I would like to be a tiny bit thinner!"
Claudia, 10, Slough, England
"I don't worry about the way I look but people in my year that I know are always looking at themselves and putting make-up on during class! I'm kind of lucky because I don't mind the way I look and I wouldn't even do diets."
Heather, 13, Glasgow, Scotland
"Nobody looks perfect, and if we were made to look the way we are, then it must be beautiful, because we wouldn't be made to look ugly would we? I think we should be who we are. The girl whose looks everyone envies is usually never very nice!"
Chloe, 11, Manchester, England
"People shouldn't worry about how they look. I think that people reckon I worry too much about my body because I am so skinny but they don't understand that lots of people like me who are too skinny don't even want to be."
Olivia, 10, Harrogate, England
"When you look good, you feel good so yeah, people should make themselves look nice!"
Nikki, 13, Stoke, England
"I don't feel worried about the way I look but kids at school make you feel insecure about how you look. It's silly really if you do feel worried about how you look. I blame models and celebs."
Sophie, 10, Gravesend, England
"I think the main problem is peer pressure and although parents and teachers claim to have been there, they don't understand how bad it can be in the present. Youths nowadays are made to feel bad if their appearance isn't perfect and because of this they wear too much makeup too young. There are girls who're 11 and 12 wearing more make-up than half the girls in year 11 put together! I also think that the fact that celebrities and models in the limelight influence younger children in particular and because they are stick thin, others then feel they should try and copy them. "
Ellie, 15, Leeds, England
"I like my look and if someone doesn't like it that's his problem!"
Eleonor, 13, Bologna, Italy
"It doesn't matter what you look like at all! There is no need for make-up, because that's not the real you."
Lauren, 10, Penarth, Wales
"I worry about how I look because I'm scared what people think of me so I started wearing make-up."
Rebecca, 12, Leeds, England
"I worry a lot about the way I look because if I feel like I don't look good then I don't feel happy."
Kate, 12, England
"Most of the time I don't care what I look like. But if someone upsets me I'm fussier."
Charlotte, 11, Nottingham, England
"Yes, I do worry about the way I look. You see skinny celebs in the paper and it puts pressure on us! All the girls in my year are on about make-up or putting it on and I feel left out if I don't wear it. I feel it makes me look prettier that what I look like now."
Bethan, 12, Neath, Wales
"It doesn't matter how you look because that's the way you've been created and you should be happy with it."
Sabah, 11, Sheffield, England
"I worry about my image loads! Even though I eat a lot of sweets I am not too fat because I exercise a lot. I do diet a bit too. I also wear a lot of make-up and try to shop in the right shops. But I care about my hair most of all."
Nikkie, 8, Hertford, England
"I just love to look fabulous because as I get older like other girls we tend to go out a lot so we all put make-up on most of the time! Mostly I don't really worry about how I look especially if it is for school!"
Holly, 10, Stockport, England
"I don't mind if my hair gets messy or my make-up smudges, I just want to look decent!"
Louise, 11, Lancaster, England
"I think it's wrong because what's so bad about looking the way you are? It's who you are that counts."
Chantelle, 13, Derbyshire, England
"I do worry sometimes but I don't normally because everyone in my class is quite scruffy!"
Hana, 7, Northamptonshire, England
"I worry about my image because if you didn't you would get laughed at and teased, especially at school."
Emma, 12, Poole, England
"I do sometimes worry about how I look but that's only with my hair because I have very curly hair and I am not allowed to straighten it when the rest of the girls in my class do! I don't worry about clothes and that stuff because I have my own style and I am unique."
Elly, 13, Darlington, England
"I feel happy with the way I am - ugly or not."
Lucy, 10, Fife, Scotland
"In the magazines and on TV they make the models look much better using computers so in real life they would look horrid for all we know!"
Alice, 12, Leicester, England
"I sometimes worry about me being so skinny because clothes don't fit me sometimes. I have to always wear a belt and I worry a lot. My mum says I have a great figure and I'm nice and slim, I could be a model."
Kayleigh, 14, Rochdale, England
"I don't care about the way my face looks but in the morning I do make a fuss over my hair. I don't really like turning up at school with messy hair. I think people who spend hours putting make-up on are ridiculous."
Evie, 10, Chantilly, France
"Why bother with make-up and fashion and everything now when you've got your whole life ahead of you to use all that stuff? Be a kid and enjoy getting messy, scruffy and just plain having fun, I know I do!"
Madi, 13, Wales
"I think image is very important to some people but it is not as important as they think it is. Some people pick friends from looks but I choose friends from personality not from looks."
Sumaia, 12, London, England
"I have got bags of make-up and I always put it on but my mum says that I look prettier without it."
Evelyn, 9, Norwich, England
"I think that even though some people do worry too much about their appearance, it is important to look respectable and wear smart clothes. Kids worry too much about their appearance because they are worried that their friends will laugh at them or they want to impress their friends. Pressure from friends is definitely one of the reasons, but I also think that all the adverts on TV presenting hair products, clothes and other 'trendy' items to children puts them under pressure to keep up with the latest fashions."
Olivia, 11, Essex, England
"To be honest, I do worry about my image but not for the sake of other people, just for me. I feel better if I think I look good."
Amy, 15, Hertfordshire, England
"I wear make-up but it's not that I'm not happy with how I look but I think it is exciting to wear bright colours on your face. I wear whatever I like. I think everyone should be themselves, not Ugg Boot clones!"
Sunni, 12, Surrey, England
"I really hate the way the media criticises people's figures."
Delliphant, 11, Gloucestershire, England
"It's not really about what you look like but about who you are. I don't worry about what I look like, but most of my friends do."
Lizzie, 12, Penarth, Wales
"Everybody thinks I look fine so I don't need to worry!"
Mohammed, 9, Sheffield, England
"I think image is very important. I spend all my pocket money on fashion to look good."
Kiran, 12, Birmingham, England
"I think looking good is a big part of my life now but I am not bothered what others think, only that if I think I look good I feel a lot better inside."
Kelly, 15, Leicestershire, England
"I think that the magazines are to blame always talking how beauty is everything."
Abbie, 13, Kent, England
"I don't think you should worry too much. It doesn't matter what you look like it matters who you are!"
Katie, 9, London, England
"As long as you feel good about yourself inside I don't care what I look like!"
Ricky, 11, Wellingborough, England
"I do care a lot about my looks which means I cause a lot of damage to my hair as I curl or straighten my hair nearly everyday."
Leah, 11, Surrey, England
"People tease me because they think I am anorexic but I am just naturally skinny. People shouldn't just assume that because someone is thin that they have an eating disorder."
Flora, 12, Oxford, England
"For me, it depends what I'm up to. I like brushing my hair and experimenting with different hairstyles. After all, everyone likes looking pretty, right?"
Amira, 13, Bradford, England
"I do care to an extent what I look like and make a bit of an effort but I'm not constantly putting on make-up or straightening my hair or re-doing my hair as soon as one hair comes out of place. I just like to look OK!"
Rebekah, 11, Isle of Wight, England
"If I look at myself in the mirror and I look fine and pretty, then I feel fine and pretty all the time. But I do worry about how I look."
Holly, 11, Colchester, England
"I don't worry about how I look because I don't care what other people think about me, as along as I'm happy with myself, that's all that matters!"
Roma, 13, Bradford, England
"I think it does matter how you look and how you feel about yourself, so do put make-up on if you want to."
Loren, 12, Manchester, England
"I worry quite a lot about my image as I want to impress people with my style."
Kathryn, 13, Lancaster, England
"I do worry about my looks, but I don't really care what people think of me, as long as I look fine then I am happy."
Sofia, 11, Croydon, England
"My sister is 15 and she is always in front of the mirror putting make-up on. My Mum tells me not to worry about looks, it's just about who you are inside."
Grace, 11, York, England
"I don't care at all what I look like. Some people in my class go on 'diets' when they are already a perfect shape. I like my food but eat healthily - why should that be a problem? People can call me what they want. It's about what is inside you."
Caitlin, 12, Lancaster, England
"No, not really. Some other people do worry lots! We should just be who we are!"
Angela, 11, Cheshire, England
"Yes I am bothered about the way I look because I want to look nice and so use make-up and buy nice clothes."
Megan, 10, Macclesfield, England
"I don't really care about how I look (unlike most girls in my school), but I really love my hair."
Adam, 11, Swansea, Wales