Longtime besties Rihanna and Katy Perry linked up at L.A.'s 1 Oak nightclub, where they both showed off their incredible bodies in sexy outfits. Katy opted for a pin-up girl look, wearing a black bra top and shorts, while Rihanna went casual in a white tank top, sans bra. 

The two were at the club to see Diplo spin a surprise set, fueling rumors that Katy has moved on from former flame John Mayer. An eyewitness said that Katy and Rihanna joined each other in the DJ Booth where they performed a sexy "bump and grind dance together" for the crowd. 

Check out more photos in the above slide. 

Photo Credit: Splash News