LOS ANGELES — Whitney Houston, who ruled as pop music's queen until her majestic voice was ravaged by drug use and her regal image was ruined by erratic behavior and a tumultuous marriage to singer Bobby Brown, died Saturday. She was 48.

Beverly Hills police Lt. Mark Rosen said Houston was pronounced dead at 3:55 p.m. in her room on the fourth floor of the Beverly Hilton. A Los Angeles County coroner's official said the body remained in the building late Saturday.

"There were no obvious signs of any criminal intent," Rosen said.

Houston's publicist, Kristen Foster, said the cause of death was unknown.

Rosen said police received a 911 call from hotel security about Houston at 3:43 p.m. Saturday. Paramedics who were already at the hotel because of a Grammy party were not able to resuscitate her, he said.

Houston's death came on the eve of music's biggest night — the Grammy Awards. It's a showcase where she once reigned, and where she will be remembered Sunday in a tribute by Jennifer Hudson, organizers said.

Her longtime mentor Clive Davis went ahead with his annual concert at the same hotel where her body was found. He dedicated the evening to her and asked for a moment of silence as a photo of the singer, hands wide open, looking to the sky, appeared on the screen.