Osbourne claims Dickinson has spent the entire tour disrespecting Ozzy and she states she's had enough on the festival's official website.
In her statement, Osbourne fumes, "Bruce Dickinson started berating Ozzy and belittling the Ozzfest audience. Out of 200 plus bands over the last 10 years, he has been the only person who hasn't had the Ozzfest spirit.
"He thought he was at a battle of the bands, always making other comments about other artists."
Osbourne insists even Dickinson's bandmates were embarrassed about the frontman's comments, claiming Steve Harris personally apologised to her for his rants.
She adds, "He personally came to Ozzy in San Bernardino and apologised for Bruce's behaviour this summer, stating that he and the rest of the band were embarrassed by their own singer."
Osbourne's comments come after Iron Maiden's final set on the Ozzfest tour last night (21AUG05), during which debris was thrown at the British heavy rockers by angry fans.
Maiden's slot on the tour will be filled by Velvet Revolver for the duration of the tour, which continues in New Mexico tomorrow night (23AUG05).