The city-wide party known as Lollapalooza didn’t stop at the 10 p.m. curfew in Chicago. Playboy hosted its annual Rock the Rabbit Lollapalooza after-party at The Underground in Chicago, where hip-hop favorite Mike Posner stopped by to perform his hit “Cooler Than Me,” and DJ Reach kept the party moving into the early morning. Of course, a pack of Bunnies and Playmates Shannon James and Crystal McCahill also had a hand in it.

Check out a few photos from the big bash.

Photos by Lacy Weathersbee