Cedric Yarbrough is letting the world know that he isn't a fan of Mariah Carey after witnessing her diva behavior firsthand.

The singer was set to make a cameo in Will Ferrell's new film The House, and after the actor talked about the "Obsessed" singer's behavior on set during an appearance on Late Night With Seth Meyers, Yarbrough took to Facebook to explain how she "ruined" the cameo, which has since been axed from the movie.

"Okay since Will Ferrell is talking, I’ma talk-ing," he wrote. "Yeah, a real funny cameo was SUPPOSED to happen in the new film #TheHouse with the superstar Mariah Carey. But it was ruined by superstar Mariah Carey. The film takes place in a suburban home but is made into a ‘Casino.’ Why not have Mariah be an act in the casino? Funny idea. It’s rumored that she eventually showed up to set. This is true. But after waiting for her for 3-4 hours!”

The comic went on to add that the music icon even allegedly told the cast and crew how she wanted things done.

“While we waited the director & team had the idea of doing a stunt that Mariah’s body double would do now & bring in Mariah to match it," he explained. "They do the stunt. All goes well. When Mariah finally showed up she refused to match the stunt. ‘Darling, I would never do it that way…’. I heard her say those exact words. She then requested a large fan for her hair to be blown around and a camera that would be above her, basically a crane shot."

He then firmly added that Mimi "was unprofessional & borderline abusive to our director, who tried his best to appease her every wish."

Yarbrough said he hopes his words teach Carey and aspiring actors a lesson in being professional while in unfamiliar settings and hopes the singer takes his words to heart.

Take a look at his full rant below:

Carey's reps have not responded to Yarbrough's claims.

See the latest controversy the singer was involved in with BET Breaks, above.