Mariah Carey’s Isolated ‘All I Want for Christmas’ Vocal Leaks onto the Web

Mariah Carey blames staff for leaking low-quality recording of Rockefeller Center Christmas performance: source (New York Daily News)

It's her own fault she can't carry a tune. But sources close toMariah Carey's widely-panned NBC tree-lighting performance at 30 Rock believe that disgruntled techies are to blame for leaking a vocals-only recording of her woeful Wednesday night appearance. Their motive? Revenge!

As Confidenti@l reported Wednesday, production workers attached to the NBC broadcast were upset that Carey kept them waiting three hours in the winter cold Tuesday night, only to blow off a taping of her Christmas performance that was intended to air during Wednesday night's broadcast.