Jackson's three children are Michael Joseph Jackson, Jr., 12 (also known as Prince Michael Jackson), Paris Michael Katherine Jackson, 11, and Prince Michael Jackson II (a.k.a. Blanket), 7. Debbie Rowe is the mother of the elder two.

Rwaramba was last fired by Michael in December 2008, and claims that when she visited the three children in April, she personally had to buy the balloons for Paris' birthday party because Michael Jackson was so broke.

"Michael had no idea about money," she says, backing up claims that Jackson was rumored to be awash in about $400 million in debt at the time of his death.

According to Rwaramba, on Friday, the day after Michael died, his mother Katherine called her from Michael's L.A. house and asked where he kept his cash.

"She said, 'Grace, the children are all crying. They are asking about you. They can't believe that their father died. Grace, you remember Michael used to hide cash at the house. I am here. Where can it be?'"

Rwaramba advised looking "at the garbage bags and under the carpets."

Then, said the former nanny, "She said, 'Grace, where are you? Come. I will pick you up from the airport.' She sounded so strong. So strong!"

Jackson's autopsy results revealed an unknown cause of death. Toxicology testing should help establish more concrete answer, but will take weeks.