Show business can be burlesque or vaudeville, the Ziegfeld Follies or smoky dives where a fella sings for drinks. In Show Business, it's all of 'em! Eddie Cantor, George Murphy, Joan Davis and Constance Ford star in a star-crossed story of stardom as small-timers who aim for the big time.in their careers and in love. Some make it. Some don't (at least not until just before the final credits). The song list of evergreens includes Dinah, Making Whoopee, Alabamy Bound and as a recurring motif that weaves the story together, the heartfelt It Had to Be You. Cantor produced, basing the film partly on his own climb to fame and proving that 35 years in show biz had taught him exactly how to sell a song, get a laugh or wring a tear.