All grown up: The Hannah Montana star is upping the raunch factor
Teacher's pet: Emma played goody two-shoes Hermione - now she wears leather jackets
Squeaky clean: Selena Gomez is exploring a wilder film role in Spring Breakers
Spring Breaker: Vanessa Hudgens has left her Disney days behind
X Factor: Demi Lovato has a new chance as a judge on the USA show
