Keith Urban performs with B.B. King, Buddy Guy and John Mayer at the 2009 Grammy Awards, in a musical tribute to Bo Diddley.

Getting to play with those three guys was phenomenal. B.B. and Buddy -- with all due respect to John, I think he'd say the same thing: they are two legends. And I also had a connection with Bo Diddley, because we'd opened some shows for him in New York back in 1996 or '97. So it was a real honor for me to get to play with those guys that night.