Credit: Brian To/FilmMagic

On Friday, the LAPD released audio of the 911 call placed around 8 a.m. by Sharon Murphy -- mother of actress Brittany Murphy, who died suddenly on Dec. 20. (Listen to audio of the tape here.)

Sharon discovered her 32-year-old daughter unconscious in the shower at the Hollywood Hills mansion Brittany shared with her husband, Simon Monjack.

In the heart-wrenching call, the anguished mother cries as she speaks with a 911 operator, who tries to calm Sharon down and attempts to relay instructions to Monjack to try and resuscitate Brittany via compressions.

"She's passed out!" Sharon cries. "We're doing mouth to mouth. Please get here quick! Please hurry!" Sobbing, she adds that her daughter is "not awake and is not breathing."

As Sharon and Monjack apparently move Brittany's body for the compressions, she says that Brittany "just threw up tons of stuff, tons and tons of water."

At one point in the disturbing call, Sharon begs "Brittany please come back!"

Although Brittany remains unresponsive throughout the call, the operator instructs Sharon and Monjack to continue the compressions until an emergency team arrives.

After being rushed to L.A. Cedars-Sinai Medical Center, Brittany Murphy was pronounced dead at 10:04 a.m. Her official cause of death -- foul play is not suspected -- has been deferred pending toxicology and neurological tests. The actress was buried on Dec. 24 at Forest Lawn Memorial Park in Los Angeles in a small, private funeral attended by family and friends.