Spinal Tap (stylized as Spın̈al Tap, with a dotless letter i and a metal umlaut over the n) is a fictional English heavy metal band created by American comedians and musicians Michael McKean (as lead singer and co-lead guitarist David St. Hubbins), Christopher Guest (as lead guitarist Nigel Tufnel) and Harry Shearer (as bassist Derek Smalls). They are characterized as "one of England's loudest bands".McKean, Guest, and Shearer wrote and performed original songs for the band. 　　The band first appeared on a 1979 ABC television sketch comedy pilot called The T.V. Show, starring Rob Reiner. The sketch, actually a mock promotional video for the song "Rock and Roll Nightmare", was written by Reiner and the band, and included songwriter/performer Loudon Wainwright III on keyboards. Later the band became the fictional subject of the 1984 rockumentary/mockumentary film This Is Spinal Tap. 　　This Is Spinal Tap was accompanied by a soundtrack album of the same name. In the years following the film's release, the actors have portrayed the band members at concerts and released music under the Spinal Tap name. Guest, McKean, and Shearer toured in the United States in April and May 2009 and performed as Spinal Tap in a "One Night Only World Tour" on June 30, 2009, at Wembley Arena in London, three days after playing the Glastonbury Festival. 　　The trio also portray the fictional American folk music revival band The Folksmen; some Spinal Tap concert appearances have featured Guest, McKean, and Shearer opening for "Tap" as the Folksmen.