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Aubrey O'Day is fired -- up!

After the pop singer took sole credit for her team's big win on "The Celebrity Apprentice" on April 1, Arsenio Hall, 56, lashed out at her.

"I guess it's flattering that I upset him so much," the singer, 28, tells the new Us Weekly (on stands Friday) of Hall, who later referred to "her stank ass" and told teammates, "I Googled her and a naked picture with a gut popped up. F--- her!"

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O'Day, who dramatically fled the boardroom after Hall's rant, adds that the former late-night host is just warming up.

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"Arsenio gets worse in the next episode, when he calls me a whore," she reveals. "He doesn't want strong women to have too much of a voice. Typical in this industry."