I don't think Whitney has much money? I thought I heard that she didn't write most of her songs and did not obtain any IP rights to those songs?
Heres an old Rolling Stone article quote:
Last year, Whitney Houston signed what is being touted as the biggest deal in history: six albums (including a greatest-hits) with Arista for a guaranteed $100 million. She received $30 million of the advance in 2001. Considering the shaky state of her live appearances, one label exec called the payout "the worst deal ever by a label and the best deal ever by an artist."http://www.rollingstone.com/news/story/5938443/the_rolling_stone_money_report
What she made that year, not sure, maybe 2002?
Touring = $0
Recording = $24 million
Publishing = $3 million
Net = $26.5 million
Perhaps her deal got voided due to her circumstances, but it says 100 million guaranteed, I don't follow her too much tbh.