The Australian television personality, who recently filmed the reality TV show in Sydney, hinted that Baywatch actor David Hasselhoff found himself excluded as an on-set clique was formed.
Zaetta told the Herald Sun that the clique comprised Can of Worms host Ian Dickson, Australia's Next Top Model judge Charlotte Dawson, Amazing Race star Nathan Joliffe and sportswoman Lauryn Eagle.
Describing filming as "like being back at school," she also said that some of the Celebrity Apprentice stars put on "a lot of antics" to help boost their airtime.
However, Zaetta praised Hasselhoff as a co-star, saying: "David is a very giving, big-hearted man - hopefully he'll come back [to Australia]."
Others taking part in this year's Celebrity Apprentice include TV personality Patti Newton, former footballer Jason Akermanis and MasterChef contestant Marion Grasby.
> David Hasselhoff issues warning to Australian fans
> Jesinta Campbell predicts 'Celebrity Apprentice' 2012 winner