Britney Spears and Madonna

t 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:

- See more at: http://www.thehollywoodgossip.com/#sthash.iHsMN5xX.dpuf
OMFG Girl-on-Girl Kissing Moments