Mel B stormed off the America's Got Talent stage on Tuesday night after fellow judge Simon Cowell made a crack about her wedding to estranged husband Stephen Balafonte. Cowell's ill-timed joke, which comes in the midst of the former Spice Girl's bitter divorce battle against Belafonte, was delivered after a magician suffered a technical malfunction during his performance. "I kind of imagine this would be like Mel B's wedding night," Cowell remarked as the audience gasped. "A lot of anticipation, not much promise or delivery." The quip clearly struck a nerve with Mel B, who proceeded to fling her glass of water at Cowell before walking out of the studio live on air. "Mel B is out," host Tyra Banks declared as she watched the drama go down. "This is live TV, y'all. Live TV." Cowell responded to the chaos by merely looking amused.