Best Fantasy Supergroup?

British rock fans recently asked to create a "supergroup" - usually a mix of players from different bands - chose all four members of Led Zeppelin. The poll, conducted by Planet Rock Radio, asked 3,500 people to create their fantasy band. We look at the results with Planet Rock producer Mark Jeeves, and we take calls, asking listeners to weigh in with their chosen supergroup. Also: When contemporary country artist Shelby Lynne took home the Grammy Award for Best New Artist in 2001, she already had more than a decade of record-making under her belt. Before getting on Central Park Summer Stage this evening, she joins us in studio to talk about the development of her music throughout the years.