Luckily for Countess LuAnn de Lesseps from “The Real Housewives of NYC” the video cameras weren’t around at the Southampton wedding of BlueStar Jets owner Todd Rome and his bride, Vanessa Brahms.

In front of 200 guests at Nello Summertimes last Thursday, the high-spirited countess commandeered the mike from Andy Hilfiger’s band and sang two songs. “She knocked over the drum set while smiling at the horrified guests,” a source said. Then, LuAnn, who was there with her husband, Alexandre Count de Lessups, seemed overwhelmed with affection for her fellow guests. “She was trying to make out with women and married men,” the source said. “A pregnant wife caught her in the act, stormed off and walked home in disgust.” Alexandre “tried to make her leave and was seen throwing her to the ground in the parking lot,” our spy continued. “She wasn’t just kissing the married men, she was also grabbing their [crotches],” another witness told The Post’s Braden Keil, adding that one male victim was the escort of one of her TV co-stars.

LuAnn and her husband denied these allegations and also denied that a few weeks ago, the countess caused another scene at Manor Lounge in Chicago by warbling an over-the-top, Marilyn Monroe-style “Happy Birthday” to a complete stranger, “and the birthday boy was not amused,” a source said. That didn’t happen either, insisted the countess.

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