Rihanna plants a smacker on Rita Ora! 

Rita Ora and Rihanna hung out the other night, quashing any rumors of a rivalry between them. Sure, it makes sense that the world would pit the singers against each other -- they're both signed to Roc Nation, they've both been publicly championed by Jay-Z, and they're both ridiculously hot. But that doesn't mean they have beef, so check yoselves. In fact, according to an adorable new pic (above) they're BFFs. While at a party celebrating Jay-Z's manager's birthday, Rita snapped a pic of Rihanna giving her a big lip-smacking kiss on the cheek. Rita tweeted: "@rihanna hatin a$$ biatch!!!! Mwah!!!!!!" (We're not at all sure what that actually means, but it's probably a term of endearment.)

See a photo of Rihanna hanging with M.I.A. after the jump.

In more "Rihanna knows every celebrity ever" news, it turns out Ri is also besties with M.I.A.! The two girls met up backstage at Kanye West and Jay's "Watch The Throne" gig at London's O2 Arena. In addition to looking like actual models, both girls also radiated a "you definitely don't wanna mess with us" vibe. (We're half scared/half jealous.) Ri tweeted: "Guess who? #wttbackstage." So the moral of the story here is that Rihanna is tight with Rita Ora, Jay-Z, Kanye West, M.I.A. and probably every other celebrity that has ever existed. Bad girls do it well.

Photo credit: @ritaora / @rihanna