Every once in a while, our favorite starlets like to show a little extra affection for each other. Sometimes these kisses are innocent pecks on the cheek, while other times they're full-on provocative lip-locks. (Such smooches have even been celebrated in songs like Katy Perry's 'I Kissed a Girl'!)
We were shocked by some of these stars going in for a little action (but not so surprised by some of them). From the iconic Britney Spears-Madonna-Christina Aguilera kisses to some famous movie hook-ups, we've got it all immortalized in the photos and videos of celebrity girls kissing girls below.