BuddyGuy

Rick Diamond / Larry Busacca, Getty Images Keith Urban is one of the most commercially successful country acts of his generation, and he's also one of the very few country solo artists who is a standout lead guitarist.

The invitation to play at Eric Clapton's Crossroads Guitar Festival in Chicago on June 26 might not have been a total surprise for Vince Gill, yet it is not one he takes lightly. Vince remembers the first time he was invited to participate, at the inaugural event, held at the Cotton Bowl in Dallas in June 2004...