02/22/2012 03:08 pm ET

'Real Housewives Of New York' Season 5: Ladies Head To St. Barts

"The Real Housewives of New York" finished taping two weeks ago with its new cast, and producers are already saying this is the best season yet -- the ladies travel the globe and even go skinny dipping.

"Sonja [Morgan] and Ramona [Singer] have totally bonded and formed a great alliance against the new ladies," a show insider tells me. "They are so inseparable this season that they shared a bed together in St. Barts and even went skinny dipping late one night after enjoying a few glasses of Ramona's wine."

This will be the first season of the hit show since original cast members Jill Zarin and Alex McCord were fired and replaced with Carole Radziwill, a distant relative of Jacqueline Kennedy Onassis, fashion designer Heather Thomson, and Wall Street wife Aviva Drescher, who is related to actress Fran Drescher.

"This season you will see the ladies travel to London, where Carole thinks it's so funny that LuAnn [de Lesseps] insists that everyone call her 'The Countess,' that she makes all the ladies refer to her as 'The Princess' to mock her," one of the ladies tells me. Carole is the widow of Prince Anthony Radziwill, who died August 10, 1999, at age 40 after a five-year battle with cancer.

But when the ladies travel to Miami and St. Barts, that's where the real trouble begins.

"Things between Ramona and the new ones get so bad at one point they even discussed recreating the bathroom scene from the film 'Bridesmaids' after Ramona gives them her new red wine to taste," an insider tells me. "Ramona now thinks it's her show for sure."

Get a glass of wine in these women and there's no telling what they'll do.

"You know me, I always skinny dip," Sonja tells me. "Why else would you rent a house? I can't tell you if I did it on film or if I did it with Ramona because that would be a storyline and I can get in trouble for that according to my contract."

Check out all of the "Real Housewives," past and present, below:

The Real Housewives of Bravo