Katy Perry, Jon Bon Jovi, Stevie Wonder, and Earth, Wind & Fire performed at a star-studded Obama fundraiser last night in LA, attended by supporters including, of course, George Clooney. The president took the opportunity to poke fun at his own debate performance, noting that singers like Perry perform perfectly each night, but "I can't always say the same," the Huffington Post reports. Clooney and Bon Jovi have long backed Obama, but what other, lesser-known celebs have gotten into the political fray?