Studio 360 goes Pop. Andy Warhol would have turned 81 this week. He revolutionized the art world by making paintings out of Hollywood faces and stuff he found at the supermarket. Velvet Underground co-founder John Cale describes Warhol's influence on art, album covers, and a celebrity-obsessed culture he helped create. And later, Kurt talks with Wilco, the alt-country indie rock band unafraid to label their music "art."