Gone Is Gone is an American rock group formed in 2016.
 The band consists of Troy Sanders, the singer and bass player from Mastodon, Troy Van Leeuwen, one of the guitarists for Queens of the Stone Age, Tony Hajjar, the drummer for At the Drive-In, and Mike Zarin, a multi-instrumentalist, composer and founder of Sencit Music who appeared with Van Leeuwen on Sweethead's "Descent to the Surface".
 An eponymous EP was released on July 8, 2016, and the band released their debut album "Echolocation" on January 6, 2017.
Killer Be Killed is the debut studio album from the supergroup Killer Be Killed featuring Greg Puciato of The Dillinger Escape Plan, Max Cavalera of Soulfly/ex-Sepultura, Troy Sanders of Mastodon, and Dave Elitch of the Mars Volta.
 It was recorded in September 2013 at Fortress Studio in Los Angeles, CA and released May 9, 2014 on Nuclear Blast Records.
 The album reached No. 58 on the U.S. Billboard 200 during its first week of release and sold around 5,500 copies.
The Vikings, also known as Keith Powell & the Vikings or Carl Wayne & the Vikings, were an English rock group from Birmingham, notable for including at various times Carl Wayne, Chris 'Ace' Kefford and Bev Bevan, who would later become founders of The Move.
"Hi Summer" is a song written by Lynsey de Paul and recorded by Carl Wayne as a single released in 1977.
 The B-side of the single is another song composed by de Paul, "My Girl and Me".
 Both songs were produced by de Paul.
 It was used as the theme tune to the Saturday night prime time ITV variety programme "Hi Summer", which also featured Carl Wayne as one of the performers.
 The song received good reviews, with notable British DJ and music critic James Hamilton writing "Ultra-brite and bouncy TV theme really does get ‘em jiving" for his weekly disco music feature in "Record Mirror".
 Although it did not reach the UK Singles Chart, it peaked at number 4 on the Rhodesian chart and made number 10 in the South African chart.
Lois Phillips Hudson was born in Jamestown, North Dakota on August 24, 1927, to Carl Wayne Phillips and Aline Runner Phillips; she was the eldest of three daughters born to the couple.
 Aline Runner was a teacher with a degree in chemistry, but left the field to become a farm wife when she married Carl, who was a largely self-educated man.
 The Phillips family lived and farmed outside Cleveland, North Dakota until, ruined by the Great Depression and the Dust Bowl, they were forced to migrate to Washington State in 1935.
 On their journey, they spent several months as migrant workers moving from location to location, following the crops' picking seasons for available work.
 During this time, the Phillips girls were considered outsiders in the communities which they passed through, and their educations were not taken seriously by the schools they were placed in, as is depicted in the short story "Children of the Harvest."
 On arriving finally in Seattle, they found a small house in the Ballard neighborhood, where Carl operated a gas station.
 Ultimately, the family bought the farm of a man who was unable to pay his taxes.
 The farm was located on the East Side of Lake Washington, outside the town of Redmond.
Carl Wayne (born Colin David Tooley; 18 August 1943 - 31 August 2004) was a singer and actor.
 He is best remembered as the front man and spokesman for The Move in the 1960s.
Mastodon is an American heavy metal band from Atlanta, Georgia.
 Formed in 2000, the group is composed of bassist Troy Sanders, guitarists Brent Hinds and Bill Kelliher, and drummer Brann Dailor, all of whom perform vocals in studio (except Bill Kelliher).
 They all perform vocals at live shows.
 Their musical style features progressive concepts and unique instrumentation.
 Mastodon has released seven studio albums, as well as a number of other records.
 The band's debut album, "Remission", released in 2002, garnered significant critical acclaim for its unique sound.
 Mastodon's second full-length release, "Leviathan", is a concept album based on the novel "Moby-Dick" by Herman Melville.
 Three magazines awarded the record "Album of the Year" in 2004: "Revolver", "Kerrang!
" and "Terrorizer".
Troy Jayson Sanders (born September 8, 1973) is an American musician, singer, and songwriter best known as a member of the Atlanta, Georgia metal band Mastodon, in which he plays bass and shares lead vocal duties with guitarist Brent Hinds and drummer Brann Dailor.
Hi Summer was a British television variety show made by London Weekend Television and shown on UK television in 1977 by ITV, the oldest commercial network in the UK.
 A total of eight episodes were made and featured a cast that included Leslie Crowther, Lena Zavaroni, Carl Wayne, Pearly Gates, Anna Dawson, Derek Griffiths, Chris Quinten and Stephanie Lawrence.
 This travelling variety show featured sketches, topical comedy and musical numbers that were recorded both in studio and on location (Stratford upon Avon, Crystal Palace, Knebworth House among others).
 The theme tune was composed by Lynsey de Paul, and sung by Carl Wayne and was released as a single.
 De Paul's theme was later re-used on commercials for "TVTimes".
The Move are a British rock band of the late 1960s and the early 1970s.
 They scored nine Top 20 UK singles in five years, but were among the most popular British bands not to find any real success in the United States.
 Although bassist-vocalist Chris "Ace" Kefford was the original leader, for most of their career the Move was led by guitarist, singer and songwriter Roy Wood.
 He wrote all the group's UK singles and, from 1968, also sang lead vocals on many songs, although Carl Wayne was the main lead singer up to 1970.
 Initially, the band had 4 main vocalists (Wayne, Wood, Trevor Burton and Kefford) who split the lead vocals on a number of their earlier songs.

Question: Troy Sanders and Carl Wayne were both what?
Answer: singer