(Radio.com) Fans in the crowd of duo Flosstradamus' set at Lollapalooza last Thursday night (July 28) were treated to not one, not two, not three, but four--that's right four--surprise appearances.

To close out their set, Flosstradamus invited newly signed Chicago Bull and hometown star Dwayne Wade, along with fellow Chicago natives Chance the Rapper and Michelle Williams, and Post Malone onstage (via CoS).

Chance wasn't even slated to perform at the newly expanded four-day festival, but that didn't stop him from doing "No Problems" and "Summer Friends" off his latest album Coloring Book. From fan-captured video, it looks like it turned into a killer way to end Lollapalooza's first night. Read more here.