Beyoncé

You've been practicing the "Single Ladies" dance every night before bedtime (don't lie!), and now it's time to put your moves to the test. Beyoncé is taking her alter ego Sasha Fierce on tour, and you know you wanna get on down with B. But don't expect hubby Jay-Z to make a guest cameo appearance -- he's spending a chunk of July on a mini-tour of his own! But while we'd love to see this Bonnie and Clyde performing together in '09, who we'd really like to see take the stage is Justin Timberlake -- especially if he's wearing his leotard and heels from SNL. He's the daaaaancer, after all.

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