On Saturday night in Los Angeles, Miley Cyrus kissed Katy Perry.
It was a memorable moment, and the Twitterverse is still abuzz over the celebrity girl-on-girl lip-lock, but it certainly wasn't the first of its kind.
Heck, it wasn't even the first of its kind involving Miley Cyrus, who famously made out with a dancer during a Britney Spears show in Las Vegas late last year.
Indeed, same-sex star smooches have been making headlines for well over a decade now, with Madonna the reigning Queen of this headline-making move.
But it's spread to serious thespians as well, such as Sandra Bullock and... Meryl Streep?!? Click through some of the most famous examples of public girl-on-girl action now:
1. Britney Spears and Madonna
Britney Spears and Madonna kiss in what may be the hottest moment in the history of celebrity news.
2. Sandra Bullock and Scarlett Johansson
Sandra Bullock has good taste in women. She smooched Scarlett Johansson at the 2010 MTV Movie Awards.
3. Meryl Streep and Sandra Bullock
You didn't expect to see these two on this list, did you? Sandra Bullock planted one on Meryl Streep at the 2010 Critics Choice Awards.
4. Britney Spears and Rihanna
Britney Spears and Rihanna nearly broke the Internet with this kiss. It took place at the 2011 Billboard Music Awards.
5. Madonna and Christina Aguilera
Madonna famously kissed Britney Spears on stage. But she didn't forget Christina Aguilera as well as the 2013 MTV VMAs.
6. Denise Richards and Neve Campbell
Yes, this kiss took place in the movie Wild Things. But it must be included because Denise Richards and Neve Campbell changed the course of many men's lives with the lip lock.
7. Paris Hilton and Carmen Electra
We go all the way back to the 2004 MTV Movie Awards for this lip lock between Paris Hilton and Carmen Electra. Check out Snoop in the background!
8. Angelina Jolie and Peta Wilson
Angelina Jolie and Peta Wilson locked lips at the 1997 Cable ACE Awards. Many say this started the same-sex smooching trend at awards shows.
9. Sarah Silverman and Jessica Biel
Sarah Silverman and Jessica Biel for came oh so close to first base at the 2007 MTV Video Music Awards. Just a little closer, ladies!
10. Miley Cyrus and Cara Delevingne
Miley Cyrus and Cara Delevingne get VERY friendly in this Twitter picture. Get a room, you two!
11. Miley Cyrus Kisses Katy Perry!
Miley Cyrus makes out with Katy Perry in this concert photo. Hot stuff!
12. Jessica Simpson Girl-on-Girl Photo
Jessica Simpson posted this photo of herself and two friends kissing. And we did not complain.
13. Sarah Michelle Gellar and Selma Blair
Though technically a "teen movie," Cruel Intentions pushed the envelope a lot, specifically with a deep kiss between Blair and Gellar.