By Jeff Labrecque
January 02, 2011 at 06:13 PM EST

Image Credit: Jorge Rosenberg/Getty ImagesRock legend Chuck Berry collapsed on stage during Saturday’s standing-room only performance at the Congress Theater in Chicago, according to the city’s Tribune. About an hour into his show, the 84-year-old slumped over with his head on a keyboard and didn’t move for several minutes. He had to be helped from the stage. About 15 minutes later, he returned to the stage with the intention of finishing, but he was interrupted when paramedics arrived. The Chicago Fire Department gave Berry a quick check-up at the scene, and the singer, who claimed to be feeling better, signed a release refusing further medical treatment and was not hospitalized.

Update: Berry’s agent, Dick Alen, told the Associated Press that the singer felt ill before the Chicago show due to exhaustion. Update II: CNN reports that a spokesperson for Berry, Andy Riesmeyer of CMG Worldwide, said in a statement, “He collapsed due to exhaustion, he then came back out to the crowd and did his ‘duck walk’ dance before leaving for the night.” Riesmeyer added that Berry, 84, “is fine” and that he has returned to his home outside St. Louis.