Kid Rock had a rock star-sized meltdown at Bon Jovi keyboardist David Bryan's birthday party. Rock, aka Robert James Ritchie of Detroit, stormed off stage during a performance of “Proud Mary” at the JBJ Nashville nightclub Feb. 8, complaining that audience members weren't clapping along. The trouble started early.

Kid Rock isn't above throwing a tantrum, even when he's in the middle of a performance. The 54-year-old singer proved this during a Feb. 8 performance at Jon Bon Jovi's Nashville bar, where he was welcomed onstage as a surprise guest for Bon Jovi keyboardist David Bryan's birthday celebration.

Late-night TV legend David Letterman returned to his former stomping grounds at 30 Rockefeller Plaza Monday for a surprise appearance on The Tonight Show Starring Jimmy Fallon. His cameo doubled as a reunion with former bandleader Paul Shaffer, who’s filling in this week while Fallon’s house band The Roots is in rehearsals for Saturday Night …