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Whitney Houston's daughter found face down in bathtub

The daughter of late singer Whitney Houston was found unresponsive, face down in a bathtub on Saturday and taken to a hospital in the north Atlanta suburbs.

Bobbi Kristina Brown was found by her husband, Nick Gordon, and a friend. The friend called the emergency dispatcher while her husband attempted to revive Brown because they did not believe she was breathing nor had a pulse, said Officer Lisa Holland, a spokeswoman for the Roswell Police Department.

When police arrived, they gave Brown additional care until she was taken alive to North Fulton Hospital.

"Right now she's still alive at the hospital," Holland said. Detectives are still trying to determine what happened.

Police were called to the home on January 23 after a report of a fight, Holland said. When officers arrived, they found no one there.

Brown (21) is the only child of Houston and R&B singer Bobby Brown. A representative for the family did not immediately return messages seeking comment.

Whitney Houston was found dead in a hotel bathtub on February 11, 2012, in Beverly Hills. The 48-year-old had struggled for years with cocaine, marijuana and pills and her behaviour had become erratic.

Authorities examining Houston's death found a dozen prescription drug bottle s in the hotel suite.

They concluded that Houston accidentally drowned. Heart disease and cocaine use were listed as contributing factors in her death.

Over her career, Houston sold more than 50 million records in the US alone.

Her voice, an ideal blend of power, grace and beauty, made classics out of songs including Saving All My Love For You, I Will Always Love You, The Greatest Love of All and I'm Every Woman.

Her six Grammys were only a fraction of her many awards.

Houston left her entire estate to her daughter.