Actress and Singer Whitney Houston Dead at 48

February 11, 2012 Updated Oct 10, 2013 at 3:52 PM EDT

By WKBW News

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Actress and Singer Whitney Houston Dead at 48

February 11, 2012 Updated Oct 10, 2013 at 3:52 PM EDT

BEVERLY HILLS, CA (ABC News) - Whitney Houston, the iconic American singer whose battles with drugs, alcohol and ex-husband Bobby Brown marred her star power, has died. She was 48.

Houston's publicist confirmed the singer's death to ABC News. The cause of death is not yet known.

Six police cars were spotted in front of the Beverly Hilton hotel today, where Houston was staying. TMZ reports that paramedics were called there this afternoon and found Houston unresponsive in her hotel room.

According to TMZ, paramedics' attempts at CPR failed and Houston was pronounced dead at 3:55 p.m. PT. TMZ reports that there were no signs of foul play.

Houston was last seen publicly on Thursday, when she appeared disheveled and disoriented in front of a Hollywood nightclub. According to the Hollywood Reporter, she got into an altercation with "X Factor" finalist Stacy Francis on Thursday at an event where she was said to be acting "belligerent."

Houston returned to rehab in May of last year seeking treatment for drug and alcohol dependence. "Whitney voluntarily entered the program to support her long-standing recovery process," her publicist said at the time.

The six-time Grammy winner staged a comeback in 2009, but was dogged by rumors that she was using drugs again. That year, she told Oprah Winfrey that marijuana laced with cocaine was her substance of choice during her 1992 to 2006 marriage to R&B singer Bobby Brown. They have a daughter together, Houston's only child, Bobbi Kristina Houston Brown.

Whitney Houston sang the national anthem prior to Super Bowl XXV, the first Super Bowl the Buffalo Bills played in.