Royal Pain! Luann De Lesseps Acting Like 'Total Diva' While Filming 'RHONY'

Luann de Lesseps isn't just showing some serious attitude when it comes to not following the rules of her probation. — she's also behaving like a queen bee when it comes to her Real Housewives of New York City costars, RadarOnline.com can reveal exclusively.

"Luann is acting like a total diva," said a source, who noted Bethenny Frankel is especially upset with the former countess. "She thinks she is an A-list star after her successful cabaret show and it's getting on everyone's nerves."

As a result, Frankel and the stage star have been "going at it" while filming Season 11.

"Her fights with Bethenny are so bad this season," the source told RadarOnline.com. "Luann's even threatened that if Bethenny comes back next year then she is not."

The former model has been performing to sold out crowds for her singing act, #CountessAndFriends, since her shocking 2017 arrest on Christmas Eve in Palm Beach, Florida.

At the time she was charged with battery on an officer, disorderly intoxication, resisting arrest with violence and crimes against a person.

In her drunken state, the 52-year-old even told cops she would kill them!

Since the "embarrassing" incident, she pleaded not guilty to one felony (resisting an officer with violence) and two misdemeanors (trespassing and disorderly intoxication) and checked into rehab.

As RadarOnline.com reported, de Lesseps ended up taking a plea deal that included 12 months of probation for battery against a police officer, but she's been blowing off her mandatory AA meetings.

"Luann feels like she has made her big comeback after such a difficult last season and is letting everyone know it," said the source. "She has delusions of grandeur. She's morphed into the diva she plays in her cabaret show and she's getting away with it because Andy Cohen loves her."