Rachel Stevens is working out to help Sport Relief - she's warming up her vocal chords as her new song, Some Girls, is the official tune of Sport relief.
She's also going the extra mile trying to get NR Showbiz's Thalia in shape which you can see on Saturday 3 July.
After a session in the gym she told us what life was like for the tiny popstral when she was 12!
What was your most embarrassing moment at school?
It was after school actually, I was riding my bike and my brakes went! ALL my friends were there and I was trying to be really cool - I crashed into a car door. It really hurt. I was like "I'm fine, I'm fine!" Really embarrassing!
How much pocket money did you get?
I used to get five pounds a week!
What did your School report say?
Rachel could be a lot better at school if she stopped gossiping and socialising!
What was your favourite cartoon?
Who was your favourite teacher and why?
I had a favourite teacher called Mr Crawshaw - he was really lovely, cool and funny.
What made you cringe most?
Maths - I hated maths!
Were you bullied?
Who was your hero or heroine?
Er ... I had quite I few! I was a huge Michael Jackson fan.
Did you have nickname?
My friends called me Rach!
What's your favourite book?
James and the Giant Peach - I loved that book! OOh, and Lord of the Flies.