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CNN anchor Chris Cuomo was boozing at his wife’s swanky magazine party in Southampton before he crashed his classic convertible into a parked SUV during a drag race, sources told The Post.

“They got him away from the scene fast,” a source said. “Everybody heard it. It was a full-blown drag race.”

Cuomo, brother of Gov. Andrew Cuomo, had just left a party hosted by his wife, Cristina, for Beach magazine at Jue Lan Club on May 28 when he got behind the wheel of his 1969 Pontiac Firebird and pulled up alongside a friend’s 1967 Pontiac ­LeMans, sources said.

Photos show a blond woman standing in front of the hot rods with her arms raised high, as if signaling the start of a race.

“I saw that woman rolling around posing and modeling on the car, and then I realized there were two cars, and they pulled into the street,” a witness said.

“We knew it was him. And then they peeled out and went to where the middle of the train station almost is, and right before that, he lost control, and ran into that Mercedes.”

Cuomo dented the back of the 2014 Mercedes SUV at the corner of Elm Street and Powell Avenue, the sources said.

His wife told him to leave, according to sources. He drove home in his car, with a cracked radiator leaking fluid, they added.

Cristina stayed and spoke to cops, who later stopped by Cuomo’s home to question him.

“He was drinking, and I believe that’s why he was sent home,” a source said. “Everyone saw the state he was in. When he crashed, it got really quiet.”

A police report makes no mention of the drag race or of drinking, simply stating that Cuomo “was distracted by someone yelling and waving.”

A source close to Cuomo offered the same explanation, saying the CNN host had been waving as he peeled away from the party and lost control.

Other pals have given different stories, saying the woman with her arms up was “pretending it was a starting line” while onlookers took photos. When Cuomo turned away, he bumped into the SUV, the source said.

Friends of the couple have said Cuomo simply hit the gas on his “old car” and it jumped, crashing into the Mercedes.

And one source said, “Chris had a drink at her party, but he certainly wasn’t drunk.”