Keyshia Cole, Kelly Rowland, R. Kelly, & Rick Ross Perform at Chicago's Big Jam

Chicago was the place to be last night as hip-hop and R&B’s finest came to town to perform at WGCI’s Big Jam 2012 at Allstate Arena. The star-studded bill featured Usher, Rick Ross, Keyshia Cole, Kelly Rowland, Fat Joe, and Future.

Keyshia brought down the house with her latest singles “Enough of No Love” and “Trust and Believe,” Kelly Rowland turned up the heat with “Motivation,” and Usher shared the stage with Rick Ross for “Lemme See.”

Fresh from his “Single Ladies” tour, Chi-town’s own R. Kelly delivered a surprise set much to the delight of the hometown crowd.

Check out some of the performances below.