Will Ferrell spilled even more details about Mariah Carey's ill-fated cameo in his new movie, "The House," and why it downright disastrous to work with her on set.

While the singer's appearance didn't make the final cut of the film, it's all anyone's been talking about leading up to its release. Cedric Yarbrough and Rob Huebel have already spoke out about her diva demands and last night, Ferrell got in on the action on "Watch What Happens Live with Andy Cohen."

The comedian confirmed Carey showed up 4 hours late to film her scenes, adding that he was sent home before she ever arrived. "At 11pm there was a knock on my trailer door and they said you can go home," he told Cohen. "I got in my car and left everyone on set and it didn't happen."

As for what kind of script notes Carey had for her minor part, which had her playing herself, Ferrell elaborated.

"One script note was like, I don't want to do this scene," he explained, "even though it was totally approved at the time."

The actor also said she wanted to change which song she'd perform in the film, after one had already been decided on.

"[She'd rather sing] something else, which is hard with clearance and became quite a kerfuffle," he said, "AKA shit storm."

Ferrell then confirmed reports she wanted her trailer filled with stuffed lambs, a reference to her fans, who she calls her "lambily."

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