Brandy made an unexpected exit from the stage Saturday night (Oct. 18) at Chicago’s United Center, where she was performing with Monica on the singers’ co-headlining The Boy Is Mine Tour. While she made it through most of the show, her abrupt departure meant fans didn’t get to hear the pair’s signature duet “The Boy Is Mine,” a hit that topped the Billboard Hot 100 songs chart for 13 weeks in 1998.

On Sunday, Brandy explained that her early exit was due to a medical concern. She posted a full statement on Instagram.

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“To my dear fans in Chicago,” Brandy wrote, “Thank you all for the overwhelming love, support, and—most importantly—your prayers. I sincerely a

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