The twice-wed veteran entertainer made the revelation about locking lips with a guest known as "Shirl" during the taping of the season three premiere of her U.S. reality show Joan and Melissa: Joan Knows Best?, which is set to air on Saturday (23Feb13).
In a clip from the upcoming episode, Rivers is shown discussing the incident with her daughter Melissa, saying, "It's like the Katy Perry song: I kissed a girl and... I don't know if I liked it or didn't like it."
Rivers, 79, was forthcoming about exploring her new dating opportunities during an appearance on U.S. breakfast show Today on Tuesday (19Feb13), insisting she has nothing to lose by turning her attentions to her fellow females.
She said, "Lily Tomlin, who is my very good friend, she and Jane Lynch had a dinner party, and I met this lovely woman. At this point, all the men I go out with remind me of my father - dead... I figured I might as well try it at this point. Maybe I've been missing something."