The two BFFs got a bit frisky during the show; Katy had her arm around Rihanna, while RiRi kept touching Katy's legs.
All in fun, but we know how Rihanna likes to get flirty with the ladies, and Katy already admitted she kissed a girl and she liked it.
Both ladies were in a great mood last night and truly were happy for Adele, who won multiple awards including Album of the Year.
Rihanna tweeted, "Congratulations #RihannaNavy !!! Love u, Yall make me so proud, Every time!!! 2 more Grammys to add to our collection, Lol! Adele I love u!"
While Katy Perry showed her appreciation as well, tweeting "@OfficialAdele show em how its done, like a BOSS. #cutestsweetestmostdeservingest"
Guess when you have Rihanna on your arm, you don't need a golden trophy.