We're going to be hearing Ashton Kutcher's name a lot, as the 33-year-old begins his transition from mere celebrity to superstar. Look for the season premiere of "Two and a Half Men" to be through the roof, as Kutcher replaces Charlie Sheen, and debuts his role as Walden Schmidt, an Internet billionaire with a broken heart.

Kutcher had the crowd in the palm of his hand last night at the "Teen Choice Awards" when he broke into song, covering Katy Perry's hit "Teenage Dream." Check it out after the break.  Taylor Swift loved it too!