On Saturday night, Rock appeared as a special guest at the 63rd birthday party for Bon Jovi founding member and keyboardist David Bryan at JBJ's Nashville, which is owned by Jon Bon Jovi.

Kid Rock gave David Bryan's birthday party a bad name, and Bon Jovi fans are not happy about it. “He's a (blank),” commented a fan on the This is Bon Jovi Facebook page. “He doesn't deserve to [be] ...