WOODBURY - Whitney Houston's official death certificate was filed in Los Angeles County today, and according to the website TMZ, the cause of death is still undetermined.

Reports say the 47-year-old singer drank heavily the night before her death, and investigators found multiple prescription drugs inside her hotel room.

The Los Angeles County Coroner's Office says it could take six weeks to get official toxicology results.

Houston will be laid to rest Saturday at the Fairview Cemetery in Westfield, N.J.

Aretha Franklin, the singer's godmother, will perform during the service. Houston's cousin Dionne Warwick, and friends Brandy and Chaka Khan are also expected to attend the funeral.

You can watch Saturday's service LIVE on News 12.com.