Bruce Willis thrilled fans of The Allman Brothers in New York on Friday night (24MAR06) when he joined the classic rockers onstage at the city's Beacon Theater. The DIE HARD star appeared unannounced at the group's gig to play harmonica on a rendition of blues great STEVIE RAY VAUGHN's THE SKY IS CRYING. The actor, dressed in oversized jeans and a T-shirt, spent most of the rest of the gig dancing behind the band.