*Bobbi Kristina Brown, Whitney Houston’s daughter, was staying in the hotel with her mother and according to TMZ had also fallen asleep in the bathtub the night before her mother’s death in another room.

Friends of the 18-year-old tried knocking on her door repeatedly and eventually had to contact security to open the door to her room so she could be removed from the tub.

Houston, who has struggled with drugs and alcohol for many years and entered rehab last year, reportedly spent Friday night at the bar of the Beverly Hilton hotel with a group of friends as well as Bobbi Kristina.

As previously reported, Bobbi Kristina was hospitalized at Cedars Sinai Medical Center on Saturday night following her mother’s death and again on Sunday morning after “having a complete breakdown.” She has since been cleared medically and released.

As reported, Houston likely died from a combination of the drug Xanax and other prescription medication mixed with alcohol, TMZ reported, citing family sources who spoke to L.A. County Coroner officials.

Coroners informed Houston’s family that there was not enough water in the singer’s lungs for her to have drowned, and that she may have died before her head became submerged in the bathtub at the Beverly Hilton Hotel where her body was found Saturday, TMZ reports.