Just two days ago, the R&B singer tweeted, "19 yrs ago today, I was in labor! My heavenly father gave me the most glorious gift I could ever receive. A Baby girl on Christmas!"
The cause of death was not immediately known, but Marie's publicist, Lynn Jeter, told CNN that a month ago, the singer suffered a grand mal seizure, which is characterized by a period of unconsciousness.
Born Marie Christine Brockert in Santa Monica, Calif., Marie released 13 studio albums over the course of her career. She was signed to Motown Records in 1976 and as a White female she held her own in the predominately African-American genre of soul music. Marie also wrote and composed a lot of her music and she played rhythm guitar, keyboards and congas.