Fox originally announced it was sendng Abdul across the nation to help dancers "find their groove thing and really shake it."
But her publicist released a statement Friday saying Abdul was too busy working on the "American Idol" DVD and preparing for the next season, Zap2it.com reported.
The statement said: "It became apparent that her prior commitments ... made it impossible to be part of this new show."
Fox President Peter Ligouri revealed last week the network had an independent investigator looking into charges of misconduct leveled against Abdul by former "Idol" contestant Corey Clark, who claims they were having an affair and she helped him select songs for the competition.
Ligouri said the results of the investigation would be made public.