What a halftime show in the pouring rain … For a guy lots of people wrote off a long time ago as an egomaniac (I haven't seen him since 1983), he turned in a tremendously professional and generous performance under scary conditions: I wouldn't be too enthusiastic about playing the electric guitar with that much rain coming down. A solid but predictable opening with his own "Let's Go Crazy," followed by the opening chords of his "1999," but then things got interesting, with "Proud Mary" and a ballad arrangement of "All Along the Watchtower." The clear theme behind his choice of those two songs is the interrelationship of American white and black music, which has gotten so separated in recent decades. Both songs were by whites (John Fogerty and Bob Dylan, respectively) and famously covered by blacks (Ike and Tina Turner and Jimi Hendrix). Then, Prince did another cover, of the Foo Fighters recent rocker "The Best of You," which must have struck him the way it always struck me: as very professional sports-sounding. And then into his finale of "Purple Rain," with Mother Nature lending a well-deserved hand.