Medina - who was reportedly blamed by Lopez's fiance Ben Affleck for creating her diva image - has taken charge of "consulting on all aspects of Mariah's career".
Insiders are already whispering that the strong-willed Medina is making trouble for the CHARMBRACELET singer.
One source says, "He's coming in like Mr Know-It-All. Mariah was working on a book deal with HARPERCOLLINS. He wanted to kill it because the deal wasn't done by him, and now he's involved."
Benny responds, "I guess I am the spoiler. Mariah had a tremendous idea (for a book). She was engaged in discussions. But we just decided, based on other opportunities, to table it for now.
"What it boiled down to was whether a book was the best use of her time and energy right now."
The business maestro also denied he was to blame for Mariah's diva demands during a recent trip to Monaco for the WORLD MUSIC AWARDS.
According to sources, Mariah demanded four deluxe hotel suites, fresh flowers throughout, six humidifiers, an exercise bike and special lighting.
But Media insists, "I wasn't in Monaco. I can honestly say I ordered not one candle, not one flower, not one car. Mariah flew over for a day from Germany, at the request of PRINCE ALBERT, to receive a Lifetime Achievement award. She asked for nothing."28/10/2003 17:28