Nick Cannon will star in his first-ever stand-up comedy special “Mr. Showbiz,” premiering Saturday, May 14, at 9 p.m. on Showtime. In a preview clip from the program, the new father imitates his grandfather’s reaction to his much-publicized beef with Eminem (or “Enema” as he calls him) involving his wife Mariah Carey. Find out how Grandpa Cannon would have handled the situation…and it doesn’t involve Twitter.