"Yes, I have been with a lady. Yeah," Diaz said the show's host, Andy Cohen. He then asked, "More than once?"
"You didn't ask explicitly how I was with a lady," Diaz told him, "but I have been with a lady."
But she's not the only famous female who's had a same-sex hookup in the past—or the only lady who's openly admitted to crushing on women either.
1. Katy Perry: The pop star revealed that her first crush was on a woman!
During an interview with Entrevue magazine, the Dark Horse singer explained, "When I was 15, I fell in love with a female friend. I thought she was beautiful and wanted to be like her."
She added, "She had such a huge impact on my life, but I never told her how I felt…Female beauty can be incredibly powerful."
2. Lady Gaga: The "Applause" singer has made no secret that she's attracted to women—and on the same Bravo show, no less!
"I like girls," Mother Monster confessed to Cohen. "I've said that before. I know people think I say things just to be shocking, but I actually do like p---y. It just depends on whose p---y it is."
3. Christina Aguilera: Xtina also shared her sexual preferences in an interview with Out magazine when she was married to Jordan Bratman.
"I don't get to kiss all the girls and the boys, but my husband knows that I get into girls," she told the magazine. "I think it's fun to be open and play."
4. Miley Cyrus: The oftentimes controversial songstress has shown us time and time again that she likes to lock lips with ladies.
Whether she's grabbing a quick peck while onstage during her concert, or hanging out with pals at an after party, the former Disney darling has had plenty a PDA moment captured on camera.
(E! and Watch What Happens Live are both part of the NBCUniversal family.)