You’d think Food Network star/talk show host/cook book author Rachael Ray would be somewhat loyal to the Dunkin Donuts coffee she peddles. But maybe not…

Rumor has it that Rachael Ray really likes her Starbucks, despite being the spokesperson for Dunkin Donuts. Is it true?

New York magazine’s Grub Street blog reports that a source spotted Rachael Ray refusing to drink Dunkin coffee during a commercial.

According to the source:

“So a friend of mine was on set last week as Rachael Ray filmed her latest Dunkin’ Donuts commercial. According to her, Rachael stormed onto the set and snapped at everyone. Not news, I know, everyone knows she’s actually a gigantic a–hole. BUT! I am also told she took one sip of her Dunkin’ Donuts coffee, yelled “What is this sh-t? Get me MY coffee,” and would not continue until she was given “her” coffee — i.e., Starbucks.”

Aw, turns out it’s not true – Rachael Ray’s publicist commented that it “never happened,” and that the report is “stupid” and “ridiculous.”

Dunkin Donuts is on Rachael Ray’s side too, with a spokesperson adding:

“I was there for the entire shoot and I assure you that the story reported on New York magazine’s website today is totally false. We enjoy working with Rachael, and we are proud to have her as our brand ambassador.”