New York: American television network NBC is apparently furious with Mariah Carey, her manager Benny Medina and her representative at Def Jam because they promised the singer would perform on "Today" to promote her new album "E=MC2" but is instead going on archrival ABC's "Good Morning America".

Pagesix.com quoted a source as saying: "Every morning show wanted Carey on for her new album, so Benny started negotiating. He demanded that 'Today' promote her fragrance and also give her a guest-star role on 'My Name is Earl.' They agreed."

But her "My Name Is Earl" part, which was to coincide with the album release, was put off when it was decided the album needed work.

"It was supposed to come out in November, then it was pushed back until February, and now the release date is April 15. The entire time, Benny told 'Today' it would get Carey for its concert series on Rockefeller Plaza. But then he stopped returning calls. Turns out, he had done a side deal behind everyone's back with 'Good Morning America' - after NBC had agreed to all of his demands."

However, Medina denies he ever promised "Today" that Carey would give a concert on Rockefeller Plaza.

"If they can show me an e-mail from anyone committing to the concert, I will personally pay for the entire production myself," he said.