Meow! Now it's catty Katrina Campins who's scratching back at her colleagues from "The Apprentice." (search

Campins claimed on a New York City radio show yesterday that her arch-rival, Amy Henry (search), slept with two "Apprentice" cast members.

Up to this point, only a tepid romance between Henry and Nick Warnock (search) has been evident on the NBC reality show - in which Henry and Campins were often at each other's throats before Campins was "fired" last week by Donald Trump (search).

"So did anything happen with Amy and Nick?" radio co-host Scott Shannon asked Campins. "She and the rest of them claimed I used sex to sell . . . she brought a lot more sex to the table than I ever did."

"She slept with one cast member, and since then has moved on to another cast member," Campins said, without naming who that other cast member might be.

"My question to her is, well, you're a 'ruthless businesswoman,' yet it seems like your emotions for two separate men are getting in the way of this job.

"She's denying it now, of course," Campins said, "and I'd be denying it if I slept with two people as well."

Henry immediately fired back at Campins.

"This claim is absolutely false and is so ridiculous it really does not warrant a response," Henry said. "I think Katrina is a beautiful, smart young woman and I'm sorry to see her use such a ploy as a PR measure.

"She was a very strong competitor on the show and was a great asset to every team . . .

"I really would have expected her to use her roadshow publicity tour as an opportunity to promote the intelligence and inner beauty that I know she has, rather than waste time attacking me."

NBC had no comment on Campins' remarks - but insiders say that, had Henry been intimately involved with someone other than Nick, it surely would have aired on the show.

The two-hour "Apprentice" finale airs April 15.