An initial autopsy report on R&B singer Teena Marie showed no signs of trauma on internal organs. Marie was found unconscious in her Pasadena, Calif. home on Sunday (Dec. 26) by family members, and is believed to have died of natural causes.

It will take about six weeks for a toxicology report that may uncover the real reason behind her death, however police found no illegal drugs at Marie's home.

Marie died at the age of 54. She is known as the 'Ivory Queen of Soul,' after being the first white female singer signed to Motown. Her first album for the label was 1979's 'Wild and Peaceful.' Among her hit songs are 'Lovergirl,' 'Fire and Desire,' 'Work It' and 'Ooo La La La.'

Following her death, many members of the music community, from the soul songwriting duo of Gamble and Huff to Q-Tip, have recognized her undeniable contribution as a singer. Lenny Kravitz released a video thanking Marie for helping launch his career.

"I was just a musician on the street," Kravitz said. "I was living from pillar to post, she took me in, she gave me a bedroom ... she gave me instruments to play ... she nurtured me and helped me become who I am."

Watch Teena Marie's 'Lovergirl'