frank sinatra aint that a kick in the head

"Ain't That a Kick in the Head?" is a song famously performed by Dean Martin, not Frank Sinatra. The song was written by Sammy Cahn and Jimmy Van Heusen and was first recorded by Dean Martin in 1960 for the film "Ocean's 11." While Frank Sinatra was also a prominent figure in the Rat Pack alongside Dean Martin, this particular song is associated with Martin's suave and charismatic style.