Jennifer Lopez on Filming Songs in “Kiss of the Spider Woman” in 'Single Shot': 'Gotta Get It' (Exclusive)

Jennifer Lopez is getting it right!

Speaking exclusively to PEOPLE at the Sundance Film Festival premiere of Kiss the Spider Woman on Sunday, Jan. 26, the singer and actress, 55, touched on the challenge of filming songs in one take.

“We did okay,” Lopez said, adding that director Bill Condon wanted the performances filmed in one shot “like the old musicals authentically were done.”

“And it's pretty amazing when you do see it and you go, ’Oh, that was all one shot right there,’ ” she noted. “And okay now they cut, but it's fascinating, you know, you go, ’Oh I didn't realize that even when I was watching the musicals when I was younger.’ ”

Lopez added, “A little extra challenge but also exhilarating, right? Like you gotta get it right. And when you nail it, everybody's like aah."

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The star also opened up about the mishaps she and costar Diego Luna had while performing onstage.

“I mean, when we were doing 'Everyday Man,' for whatever reason, the stages that we were filming at were raked, like very [steep],” she said. “And me and Diego, just kind of kept falling down and trying to do these turns and it was just like it was a nightmare.”

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She added, “It was a nightmare and we did what we could in the 4 hours we had to shoot it. It was challenging like that.”

“It was challenging in the way that indie films are challenging, where you have limited time, limited money, you gotta get it,” Lopez told PEOPLE. “If you don't get it, you're not doing it.”

“And so it won't make the film. It's a lot of pressure in that way, you know, and so you gotta come very prepared and ready to go and nail it and so that was a little bit of a mishap in that one, but we got it!,” the Unstoppable star continued. “We got it.”

Kiss of the Spider Woman sees Luna, 45, take on the role of a political prisoner during Argentina's civil war in the 1980s, incarcerated alongside another man portrayed by Tonatiuh. Lopez stars in the film as movie star Ingrid Luna.

The production is a reimagining of John Kander, Fred Ebb and Terrence McNally's stage adaptation of Manuel Puig's 1976 novel of the same name.

Kiss of the Spider Woman's release date is yet to be announced.

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