Britney Spears Claims Justin Timberlake Cheated on Her in 'Woman in Me' Memoir

More bombshell allegations from Britney Spears' upcoming memoir, "The Woman in Me," are emerging. She claims it was Justin Timberlake who cheated on her. For years, there was speculation that Spears strayed from their relationship which was fueled by Timberlake's massive hit song "Cry Me a River." In her memoir, the pop star accuses him of cheating on her with an unnamed celebrity.