The former Curb Your Enthusiasm star is well aware of her limited musical skills and Barry learned the hard way after encouraging her to belt out Ronny & the Dayonas' Little GTO hit for the family road trip movie.

"I said, 'I'm not a good singer, but I'll do my best and then you can tell me what you want me to do...' I closed my eyes and Barry was sitting next to me and I sang it, top of my lungs. I look over and he's crying, tears, crying!"

The funny scene still made the film's final cut, but that hasn't deterred other filmmakers from calling on Cheryl to put her vocals to the test.

The actress recently portrayed a trumpeter who becomes stuck in an elevator with members of her orchestra in festive movie Christmas Eve, and she reveals writer/director Mitch Davis initially dismissed her request to bring in a singing stand-in.

"When we were shooting it, the director Mitch Davis, the nicest guy, very thoughtful, sweet man, said, 'This will just take a second, get in the studio and sing this.' I said, 'I cannot sing', and he said, 'Cheryl, I'm sure you're better than you think you are.' I said, 'I'm gonna give it my best, and you tell me.' And the other actors somehow know how to sing and they're really good at it...! Later Mitch said, 'If it's all right with you, I think we'll bring somebody in.' I said, 'I begged you to do that from the beginning!'"