This Is Spinal Tap

This is Spinal Tap is presented as a serious rock documentary, purportedly filmed and directed by the fictional Marty Di Bergi (Rob Reiner, who was also the actual director of the movie). The faux documentary covers a 1982 United States concert tour by the fictional British rock group "Spinal Tap" to promote their new album Smell the Glove, interspersed with Di Bergi's one-on-one interviews with the members of the group and footage of the group from previous periods in their career. Read more on Wikipedia.