Duets (2000)
Duets is a 2000 American road trip film co-produced and directed by Bruce Paltrow and written by John Byrum. The motion picture features an ensemble cast co-starring Gwyneth Paltrow, Paul Giamatti, Maria Bello, Scott Speedman, Andre Braugher, Huey Lewis and Angie Dickinson, among others. The movie "revolves around the little known world of karaoke competitions and the wayward characters who inhabit it."
More at Wikipedia.