Girls just want to have fun.

Cyndi Lauper cursed out a heckler who shouted at her during her Las Vegas residency opening show on Friday night.

“I don’t know what the f–k he’s saying,” Lauper, 72, said in footage taken by a fan at the show. “Please remember where you are, OK?”

Lauper continued: “If you’re trying to shade me bitch, I’m going to come for you. I’m from Brooklyn, and if I want to f—king talk, I will do a tap dance if I f—king want.”

The crass remarks earned the “Time After Time” hitmaker cheers and applause from the audience. She then returned back to her performance.

A rep for Lauper did not immediately respond to Page Six’s request for comment.

Lauper previously promoted her upcoming Vegas residency, which will run April 24, 25, and 29 and May 1 through May 2 at the Colosseum, in a video shared to her Facebook earlier this week.

“Hey, we’re in Vegas! I can’t believe it,” the music icon said in the clip.

“[There] will be a couple of surprises in the show, but you have to come and see it. Not gonna tell you. I’m excited! Anyway, come on down [because] it’ll be a night of Cyn! I’ll see you at the show.”

She first announced the residency in October.

The Vegas shows are the first string of announced performances for the singer since finishing her “Girls Just Wanna Have Fun” tour, which she previously called her “farewell.”

“It’s an arena tour, which I haven’t done in a long time,” the songstress said in June 2024, announcing the tour.

“I just want to thank everybody, say goodbye, celebrate with fans that have been so loyal and sweet and were there for every crazy-ass concert or thing that I did and I’m excited about doing it. I don’t think physically in another five years I will be as good, but now I can do it, you know?”

“I’m going to include a piece of everything … and combine art and moving visuals, use a lot of color and design. I haven’t had a fun tour since ’84, so now it will be the ‘24 fun tour!”