Mariah Carey loves Beyonce -- but who the heck is J.Lo, anyway? Screaming Mimi was, according to Faded Youth, giving an interview to a German television station, and when asked her opinion of Beyonce, gushed about "how beautiful and sweet and talented" she is. But when the conversation turned to Lopez, Carey's tune changed. She looked uncomfortable and said, "I don't know her." No word on what might've caused a rift between the two divas, but speculation is that it might have something to do with using the same