As anyone who saw the dance sequences in Idlewild can attest, OutKast are no strangers to ass-shaking. Yet Antwan "Big Boi" Patton had little experience in the realm of tutus and pliés before the Atlanta Ballet approached him about collaborating on a new production. "I've dated a couple of ballerinas," he says. "But I was like, 'That sounds kind of dope -- let's crank it up.'"