After the Roc Nation brunch on Saturday, Big Sean performed at the House of Blues in West Hollywood, and it seems like the crowd for that event was even more star-studded! Justin Bieber was there, along with Chris Brown, Kendall Jenner, Kylie Jenner, Demi Lovato, Jennifer Lopez and yup, even Yeezy. J. Lo posted the pic above and wrote, "After the show... This happened #houseofblues #bigSean."

Big Sean performed several old hits and then debuted his new song "Stay Down," and after getting a few pals to join him onstage, Kanye appeared and the boys performed the "I Don’t Like" remix along with "Blessings." Of course, there was some sort of a tech issue, so Kanye took the high road and screamed "Unprofesessional!" in the middle of the set.

In other news, why was Kylie sporting dreads? Turns out she had some sort of high fashion shoot in the desert earlier. Hey, at least she kept her clothes on! Well, sorta:


But can we talk about Chris' hair? We love that he's hanging with fans, but this hue is his worst yet!