Rihanna came through on a promise she made to her BFF Katy Perry and hosted her bachelorette party this weekend!

First up, Ri and Katy hit up the Hard Rock Hotel Beach Club in Las Vegas Saturday night (Sep 18), where Katy was presented with a naughty little cake made into the shape of a man’s torso with a little something extra (click here to check it out **NSFW**). After that, the future Mrs. Russell Brand and Rihanna headed to the MGM Grand Hotel/Casino where Ri treated Katy to a Cirque du Soleil show. And after the show, Rihanna and Katy went backstage to meet the cast and pose for lots of pics before the party girls headed off to club Sapphire to cap off their eventful night.

Check out a few pics of Katy and Rihanna backstage at the Cirque du Soleil show in Vegas below…