McFly have had an amazing year - and it's not over yet!
On 15 November, their new single, Room On The Third Floor, hits the shops.
Tom, Danny, Harry and Dougie popped into Newsround to tell us what's going on the crazy world of McFly.
Let's hear about the new single...
Tom: It's the title track from the album. Me and Danny wrote most of the album on the third floor of a hotel, so we wrote a song about being stuck in the same room for about two months. It was very boring.
Danny's from Bolton and I live just outside London, but we had to stay somewhere in London because we were trying to get a record deal.
Do you all live with each other now?
We've been living with each other for about a year and a half.
Danny's good because he makes us laugh. Harry takes over the whole house - his stuff's everywhere.
If it wasn't going to work, we would have moved out by now.
Tom: We spent a year and a half trying to find people to be in the band. We spent time with Doug and Harry before we picked them. We decided these two were the best of the bunch.
Tell us about the video
The video was only a day shoot, but because it's half-animated, it took about three months to put that on. We saw it for the first time a couple of weeks ago.
We had to have our heads clamped to make sure we didn't move. The paint itched and it took ages to come off.
What's been your highlight?
Harry: The tour. Having a number one album and getting the record for being the youngest band to get a number one, because The Beatles previously held it. It's been a crazy year, but a really good one too.
What's the key to having a successful band?
I don't think there is any formula. As long as we are having fun and people are buying the records. The fact that we write our own stuff is quite a big advantage. You can't just put anyone together. If anyone of us wasn't in the band, it would be totally different.
Do you ever complain?
We can't because we are doing what we want to do and having an amazing time. We have got the best job in the world at the end of the day - and there's no job in the world that you don't have to prepare for and work for.
What's your advice to budding musicians?
Tom: Stick at it. Four years ago, I was doubting myself and didn't know what I wanted to do. I kept on writing songs and got better and better. You never know what's around the corner...