Get Ready to Be Boyzvoiced

Get Ready to Be Boyzvoiced is a 2000 Norwegian mockumentary about a fictional boy band called Boyzvoice. Outside Norway, it has been screened multiple times on Australian television channel SBS.

Although the actors portraying band members pretend to be utterly talentless and unable to get one single note right in the film, all Boyzvoices vocals were in reality performed by actor yvind Thoen Hot Tub, and, on occasion, actor Espen Eckbo MPete.

Source: Wikipedia