That's Amore - Dean Martin & Jerry Lewis

Martin and Lewis were an American comedy duo, comprising singer Dean Martin (as the "straight man") and comedian Jerry Lewis (as his stooge). The pair first met in 1944, and worked together in nightclubs, on radio and television, and in films.

The act was simple: the low-key Martin would try to sing or speak to the audience, and the manic Jerry would distract him and loudly interrupt him in a high, adenoidal voice. The uninhibited Jerry would ad-lib freely and run around the stage, and the quick-witted Dean would keep up with him, building the comedy (and the audience excitement) to fever pitch. It was an irresistible combination, and the team triumphed in hugely successful movies, live TV shows, and personal appearances.

After five years at Paramount Pictures, Dean Martin was tiring of scripts limiting him to colorless romantic leads while the stories centered on the antics of Jerry Lewis. Martin also noticed that Lewis was being more ambitious, playing comedy scenes for pathos and staging more of the action himself. The last straw came when Look Magazine gave Martin and Lewis a cover photo -- and cropped Martin out of the picture. Martin dutifully fulfilled the rest of his movie contract, and left the act at his first opportunity, in 1956. The Paramount movie series continued successfully with Lewis as a solo performer; Lewis also realized his ambition to direct.

Apart from a surprise appearance by Martin on one of Lewis's annual telethons for muscular dystrophy 20 years later in 1976 (orchestrated by mutual friend Frank Sinatra), they never performed together again, although they reconciled privately in the later years of Martin's life.

Another source claims that contrary to belief, the 1976 MDA telethon was not the first reconciliation of the legendary comedy team. In 1960, four years after they split, Martin & Lewis briefly reunited. Both were performing their own separate acts at the Sands hotel in Las Vegas, a club they frequently played while they were together. Lewis caught Martin's closing act and Martin introduced his former partner to the audience, bringing him on stage. For about fifteen minutes, they joked a bit and sang a duet of "Come Back to Me". Unfortunately, the reunion was only a one time thing. Later when Lewis was too exhausted to perform his act, Martin generously replaced him.