Vanessa Hudgens
Age: 22
What She's Done: Probably best-known for her role as Gabriella in 'High School Musical,' Hudgens - who turns 23 on Dec. 14 -- has tried to break out of the high-school box with starring roles in 'Beastly' and 'Sucker Punch.'
What's Next: Hudgens will certainly shatter that good-girl image in 'Gimme Shelter,' where she plays a hardly-recognizable pregnant teenager who refuses to get an abortion. You can also check her out in 'The Frozen Ground,' where once again she's going against type as a girl who escapes the clutches of a serial killer and brings him to justice.
Did You Know? She intended to audition for 'American Idol' at one point before her career took off.