Girls Gone Mild
This photo shows Aguilera at a Nylon magazine party on March 21, 2007, in New York.
Hayden Panattiere, 17
Panattiere is one of many young stars who aren't partying themselves into oblivion. Click to read about more of Hollywood's good girls.
Hilary Duff, 19
Here, Hilary arrives at the 2007 Much Music Awards in Toronto on June 17, 2007.
Keira Knightley, 22
Knightley is shown here at a party for the European premiere of "Pirates Of The Caribbean: Dead Man's Chest" on July 3, 2006 in London.
Amanda Bynes, 21
Bynes is shown here at the New York premiere of the film "Hairspray" on Monday July, 16, 2007.
Raven-Symon
Natalie Portman, 26
Portman keeps it simple at the 2007 Vanity Fair Oscar Party at Mortons in this Feb. 25, 2007 photo.
Nicky Hilton, 23
Nicky Hilton is shown here arriving at the Gwen Stefani concert at the Palms Casino Resort in Las Vegas on April 21, 2007.
Miley Cyrus, 14
Actresses Miley Cyrus appears onstage during MTV's "Total Request Live," Tuesday, June 20, 2006, in New York.
Scarlett Johansson, 22
Johansson is shown here at the premiere of "The Black Dahlia" at the 63rd Venice Film Festival on Aug. 30, 2006.
Mandy Moore, 23
Mandy is shown here arriving at the premiere of Warner Bros. Pictures' "License to Wed" at the Cinerama Dome Theater on June 25, 2007, in Los Angeles.
America Ferrera, 23
Ferrera is shown here arriving at the 13th Annual Screen Actors Guild Awards on Sunday, Jan. 28, 2007, in Los Angeles.
Jo Jo, 16
Jo Jo arrives at the premiere of "RV" on April 23, 2006, in Los Angeles.
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Carrie Underwood, 24
In this photo, Underwood arrives to the "American Idol Season 6 Finale" on May 23, 2007, in Hollywood, Calif.