This case discusses the 1991 lawsuit between Gilbert O'Sullivan and his company Grand Upright Music against rapper Biz Markie and his record label Warner Bros. Records. Biz Markie had sampled and used music from O'Sullivan's song "Alone Again Naturally" in his own song without permission. When sued, Biz Markie claimed the plaintiffs were not the true copyright holders, but they provided documentation showing ownership. The court found Biz Markie liable for copyright infringement and he was forced to pay a substantial settlement. This case established that sampling copyrighted music without permission was illegal.