The fact that the numbers cited above dwarf Ross’s solo sales explains why, after decades of resistance to such a thing, she re-upped as a Supreme for a proposed world reunion tour in 2000, a beyond-lucrative project carrying a top-ticket price of $200. However, in a splendidly ironic role reversal, it was Mary Wilson and Cindy Birdsong who back-stabbed Ross; offered a fraction of the $15 million reserved for Ross, the pair refused to recede into her spotlight for a second time in their lives. Ross then tried to replace them with two nominal Supremes of the ’70s, but Supremes fans were interested...