Britney Spears
After honing her pop chops on Star Search and alongside Christina Aguilera, Ryan Gosling, Keri Russell and Justin Timberlake for on Disney's New Mickey Mouse Club at 11, she and her sexy Catholic schoolgirl uniform exploded on the tween scene with the catchy tune, "…Baby One More Time." The same-named debut sold more than 22 million copies and she followed it with two books co-written with her mom, two more No. 1 albums, 2000's Oops! I Did It Again and 2001's Britney, and an unsuccessful leap to acting (Crossroads). She proved she's "not that innocent" as her style (belly button
