According to the gossip site Radar Online, Chaka Khan quietly returned to a rehab center a few weeks ago -- only to have her stay blown out of the water by fellow patient Lindsay Lohan.
Chaka, who's had substance abuse problems in the past, allegedly checked into California's Cliffside Center for treatments, only to be driven away by Lohan's diva-like behavior. A source says, "Chaka was really cool about everything at Cliffside, but Lindsay just pushed all of her buttons. Chaka told her she was childish and told her to grow up. It got so bad that she refused to get in the same car with her or go to the same meetings with Lindsay."
The source says that Chaka cut her stay short, but seems to be in good spirits now, saying, "Chaka’s a strong woman and her time at Cliffside did help her get a lot better. She just needed the strength, and at the end of the day, she got what she was looking for.”