UPDATE: Chaka Khan Won't Perform at Grammys

The music legend died Saturday at age 48. Houston was pronounced dead at 3:55 p.m. at the Beverly Hilton Hotel in Beverly Hills, California where she was a guest, Beverly Hills Police lieutenant Mark Rosen confirmed in a briefing. Police received a call at 3:43 p.m. from hotel security, and although Beverly Hills fire and police responded minutes later, attempts to resuscitate her were unsuccessful.

The cause of death is unknown, and is currently under investigation. According to Rosen, there was "no obvious evidence of foul play or cause of death."
ET's Last Interview with Whitney Houston
Often referred to as the "Queen of Pop" or "the Voice," Houston is a six-time Grammy winner and the most awarded female act of all time, though her career was overshadowed in the later years with her rumored drug use.