The UK singer also says fans will realise the band's friendship is real from watching their new E! show.
Max, Nathan, Jay, Tom and Siva are The Wanted: one of the biggest bands in the world. Find out more about them below.
Real Name: Maximillian Alberto George
Real Name: Nathan James Sykes
Real Name: Thomas Anthony Parker
Real Name: James McGuiness
Real Name: Siva Kaneswaran
First Single: All Time Low
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The group can be seen rehearsing for the promo, discussing Jay's beard and playing with tape measures in the footage.
The 'Glad You Came' singer revealed he had a "vocal rehab session" and is "steadily" on the way back.
The 'Walks Like Rihanna' singers gave a powerful live performance on the popular US talent show.
It pays tribute to Backstreet Boys, N*Sync and Take That, but what else do were know about The Wanted's new video for 'Walks Like Rihanna'? Check out our guide for the song, which is released in June.
Check out some of Nathan's best moments as The Wanted star turns 20 today. The 'Glad You Came' singer is set to undergo an operation on his throat in LA today - we hope you get better soon Nath!
It's been a whirlwind year for the 'Glad You Came' band, including everything from cracking America to supporting Justin Bieber in concert, so join Capital as we take a look at The Wanted's top 20 moments of 2012.
Check out all the highlights from The Wanted's day at the Jingle Bell Ball in London.
The sun goes down, the stars come out... Get the latest song lyrics for music by the 'Glad You Came' singers.