People

By Guy D. Garcia

/ Since Cathy Rigby stepped down from the balance beam after the 1972 Olympics, the former gymnast has done some commercials, a little sports commentary. Now Rigby, 33, who studied singing and acting for years, is unveiling a song-and-dance act she has worked out with Husband Tom McCoy, 29. Showcased at the Beverly Wilshire Hotel before an enthusiastic Los Angeles audience, the $100,000, 40-minute production includes seven costume changes and features Rigby's good-natured takeoffs on Tina Turner, Cyndi Lauper, Patti LaBelle and Debby Boone. Rigby finds shaking a leg more enjoyable than doing flips. "With singing," she says, "there's more room to have fun." Sure, but you can still fall flat on your face.