whitney houston*Two significant pieces of information have come to light regarding the death of Whitney Houston.

Whitney Houston was found in the bathtub of a Beverly Hills hotel yesterday … with her face underwater … people close to Whitney tell TMZ. And the singer took Xanax before big shows. Reports now say she was scheduled to perform last night.

We’re told Whitney believed the Xanax helped calm her nerves before going out in front of people. According to our sources, Whitney claimed to have anxiety and panic attacks and the pills helped her relax before taking the stage.

Our sources say the people inside of Whitney’s hotel room when she died were aware Whitney would take Xanax before shows. We’re told those people never saw Whitney take any pills, she would just tell them she did. They are unaware how many she would take or if she took any other drugs.

According to our sources, Whitney did not mention taking Xanax yesterday.

Our sources say Whitney had been in a good mood all day and was excited to be performing that evening.

Meanwhile, TMZ’s sources say Houston’s stylist, hairdresser and two bodyguards were among the people in the room at the time.

We’re told they became worried about Whitney because she had been in the bathroom for over an hour and it was time to start getting ready for the Clive Davis party.

Our sources say they began to knock on the door and there was no answer. We’re told the hairdresser, who is female, went in to check on Whitney. She immediately screamed and, according to our sources, one of the bodyguards came running in and pulled her out of the tub.

We’re told Whitney’s face was below the water and her legs were up … like she had slid down the back of the tub.

According to our sources, her body was very cold and the bodyguard attempted CPR. That’s when hotel security was called.

Paramedics arrived shortly thereafter, but Houston was pronounced dead at 3:55pm on Saturday, Feb. 11, 2012. The acclaimed singer was 48.