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

Miley! Taylor! Selena! See the crop of under-20 celebs who rocked 2008. By Serena Kappes

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DEMI LOVATO

Age: 16
After starring with her pals the Jonas Brothers in Camp Rock and opening for them on their Burning Up tour, Lovato – whose profile was raised even higher when Miley Cyrus and friend Mandy Jiroux mocked her and BFF Selena Gomez on YouTube – has stepped out on her own. She released a debut pop-rock album, Don't Forget, and has her own Disney show, Sonny with a Chance, debuting next year.