Los Angeles: Hollywood stars Gerard Butler, Demi Moore and Michelle Monaghan took to the stage at a karaoke bar treating the guests to a singing performance.
Butler and Monaghan are currently shooting `Machine Gun Preacher` together, while Moore is working on `LOL: Laughing Out Loud` with Miley Cyrus.
But all three managed to take time off from their busy filming schedules for a night out, reported TMZ.com.
They headed to the Rockstarz Karaoke Bar & Grill in Garden City, Michigan where the three actors went onstage together and stunned patrons with a performance of AC/DC`s classic hit `You Shook Me All Night Long`.
Footage of the rowdy rendition has now surfaced online.