showbiz gossip straight to your inbox with the Daily Star's FREE newsletter Singing legend Frank Sinatra was a serial prankster who played elaborate tricks on his Rat Pack pals. Among his stunts was pretending to be Adolf Hitler on a movie set and swapping Dean Martin’s golf balls for ping-pong balls.The singer and actor’s japes are detailed in a new book on the Chairman of the Board by his musician mate Tony Oppedisano.He said: “For Frank, pranks were a form of bonding.