It's Always Fair Weather (1955) - (Movie Clip) Baby You Knock Me Out
Lou Lubin and Harry Wilson leading the thuggy chorus wrapping one Andre Previn, Betty Comden and Adolph Green tune (basically a fight song for fictional "Stillman's Gym"), Cyd Charisse (as sports-savvy TV producer "Jackie") crushing the next, a famous bit from the Gene Kelly/Stanley Donen-directed It's Always Fair Weather, 1955.