Whitney Houston died this afternoon. Her rep, Jill Fritzo, confirmed the news to us today, saying, "Unfortunately it's true." Kristen Foster, who also reps the singer, added that the cause and the location of her death were unknown. TMZ is reporting that Whitney passed at the Beverly Hilton Hotel, where Clive Davis' annual pre-Grammys party is being held tonight. Whitney was 48 years old. Story developing.