Having co-starred on The New Mickey Mouse Club with Britney Spears, 'N Sync's JC Chasez and Justin Timberlake, and Felicity's Keri Russell, it was just a matter of time before the record companies descended upon Christina Aquilera. Combining ultra-slick production with a liquid voice and a not-so-innocent gaze that makes grown men feel uncomfortable, this shape-shifting diva shot up the charts with catchy pop hits such as "Genie in a Bottle."