 There are two versions of Fred Astaire (qv)s "I Wanna be a Dancin  Man" number. The first was shot in front of a red curtain in a more  casual attire. Other than that it had the exact same choreography.  MGM wasnt pleased with the costume, so they reshot the number in  front of a different backdrop, with Astaire in a far more debonair  suit. When they made "Thats Entertainment III" they did a split  screen comparison of the two numbers.