Lainie Sakakura and the men in a performance from Fosse.
Woman of the Year (1981): Raquel Welch (who replaced Lauren Bacall in the original run) and Marilyn Cooper perform "The Grass is Always Greener" as part of a Kander and Ebb tribute on the 1984 Tonys.
Purlie (1981): Sherman Hemsley and the guys sing "Skinnin' a Cat".
La Cage aux Folles (1983): George Hearn and the Cagelles perform on the Tony Awards. Note that Hearn is in a tuxedo while singing "I Am What I Am" because the network wouldn't allow a man in drag to perform on the Tonys.