EntertainmentTeen Takeover! The Year's Hottest (and Youngest) Stars

JONAS BROTHERS

Ages: Nick, 16, and Joe, 19 (with Kevin, 21)
The threesome sure packed a lot into 365 days: They won six Teen Choice Awards, starred in the wildly successful Disney Channel movie Camp Rock, had a No. 1 album (A Little Bit Longer) and broke iTunes records as the first band to sell more than 100,000 downloads of three consecutive singles – and that's just the start of Jonas Mania. The platinum-selling band has a new TV series, J.O.N.A.S., a Disney Channel reality show and a 3-D concert movie (following this year's sold-out Burnin' Up tour) hitting in 2009.