Officials from the Los Angeles County coroner office arrive at the Beverly Hilton Hotel in Beverly Hills where singer Whitney Huston was found dead earlier on February 11, 2012 (GETTY) Officials from the Los Angeles County coroner office arrive at the Beverly Hilton Hotel in Beverly Hills where singer Whitney Huston was found dead earlier on February 11, 2012 (GETTY)

PERSONAL TURMOIL

By the early 1990s, Houston reigned as the queen of pop, but her critical and commercial success on stage was accompanied by an increasingly troubled personal life. In 1992 she married singer Bobby Brown, who had a bad-boy reputation, and their tumultuous 14 years together were marred by drug abuse and domestic violence.

In 2000, she and Brown were stopped at an airport in Hawaii and security guards discovered marijuana in their luggage. In a 2002 TV interview, she admitted using marijuana, cocaine, alcohol and prescription drugs.

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The pair also starred in a reality TV series, "Being Bobby Brown," which painted an often unflattering portrait of the couple.

The last 10 years of Houston's life were dominated by drug use, rumors of relapses and trips to rehab.

She launched a comeback tour in 2009, and in April 2010 she called media reports she was using drugs again "ridiculous." In May 2011, Houston enrolled in a drug and alcohol rehab program.

Despite her personal troubles, Houston commanded great affection among her music industry colleagues, and emotional tributes flooded the media in the hours after news broke of her death.

"I am absolutely heartbroken at the news of Whitney's passing," legendary music producer Quincy Jones said in a statement. "... I always regretted not having had the opportunity to work with her. She was a true original and a talent beyond compare. I will miss her terribly."

Barbra Streisand said in a statement: "She had everything, beauty, a magnificent voice. How sad her gifts could not bring her the same happiness they brought us."

Pop star Rihanna posted on Twitter "No words, just tears."