Brandy is speaking out after abruptly walking off stage during one of the first stops on her first coheadlining tour with Monica.

The singer, 46, apologized to fans in a statement shared on Instagram, addressing the "abrupt end" to her and Monica's concert in Chicago on Saturday, Oct. 18.

"After weeks of nonstop rehearsals, last night I experienced dehydration and feelings of wanting to faint," she wrote, adding that "everyone involved agreed that prioritizing my well-being was of the utmost importance."

According to videos shared on social media, Brandy abruptly exited the Chicago concert early, leaving Monica to take the stage solo. The evening reportedly ended before the duo had performed "The Boy Is Mine," the 1998 hit that gives their tour its name.

"Monica came out, monologued, sat, sung and left," one fan wrote on X. "No bye, no nothing. Screen went off. Lights came on and they told us to get out."