R&B singer #Monica jumps into crowd at Detroit concert after seeing man hit a woman A fight broke out in the audience on Saturday night, bringing a halt to Detroit’s Riverfront Music Festival. R&B singer Monica left the Hart Plaza stage to intervene after seeing a man hitting a woman. The singer yelled from the audience, “You don’t hit no f**kin’ lady like that.” The audience cheered as Monica was helped back up to the stage. #Detroit | Traci Fant