in Zac Posen
She's all grown up! The Nickelodeon starlet, 17, shined at Elton John's AIDS Foundation fete, where she enjoyed a performance by Florence + the Machine.
in Zuhair Murad
Sticking to her signature sequins, the country superstar, 21, popped up at the Vanity Fair
Oscar Party, where she met up with BFF Selena Gomez
star, 22, currently between boyfriends, danced with High School Musical
costar Ashley Tisdale
at the Elton John viewing party.