21 Under 21: Nick Jonas

21 Under 21: Nick Jonas

No. 6: Nick Jonas

Birthdate: September 16, 1992 (age 18)

Why He's Hot: Sure, the youngest JoBro was voted Pop's Sexiest Man in our 2010 poll, but Nicholas Jerry Jonas is more than a pretty face. In February, Nick broke from his band of brothers and release the first album by his more mature side project, Nick Jonas & the Administration. This summer, he rejoined the trio to star in a hit Disney flick ('Camp Rock 2') and took the show on the road for a huge world tour. And yeah, his big brown eyes and luscious locks don't hurt to look at hurt, either.

Exclusive Jonas Brothers Backstage Tour

Video Below: Nick chats with Billboard.com about his solo album

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