Rocker Jon Bon Jovi, 39, has loaned a black leather coat and a black Stetson hat, among other items, to Cleveland's Rock and Roll Hall of Fame and Museum. The jacket appeared on Bon Jovi for the inside cover of his rock group's 1988's "New Jersey" album. In fact, Bon Jovi is a proud son of New Jersey. On May 16 he will deliver the commencement address at that state's Monmouth U niversity. He will also receive an honorary degree.