Mark Ribowsky in his unauthorized biography, The Supremes: A Saga of Motown Dreams, Success and Betrayal, says Diana Ross was guilty of “quietly twisting the knife in the other Supremes” as she rose to the top.  “The Diana Ross few knew outside of the Motown colony was on a fast track to rise to the top from the first day she got to Motown; not incidentally, that was also the first day she knew who[m] she wanted to sleep with to keep up the momentum. That, of course, turned out to be (Motown founder) Berry Gordy, but only after” some other in-house romances, the book says.  ”In no time, Ross would climb beyond [the Supremes] onto the A-list as a solo act, record six more Number 1 songs, and earn millions as well as top billing in two movies.”  Is this considered shocking news?  I thought we all knew she slept her way to the top.    

New York Post