Bruce Springsteen

Keyboardist Danny Federici, who for four decades played alongside rock star Bruce Springsteen as part of the E Street Band and helped define his rollicking sound, has died of melanoma. He was 58.

Federici's death at Memorial Sloan-Kettering Cancer Center in New York on Thursday was announced on Springsteen's official Web site and the rocker postponed a pair of weekend concerts in Florida.