Question: Who did the vocals on the song "Warm Machine"?
Context: "Warm Machine" is a song by British rock band Bush.  It was released on 11 February 2000 as the second single from the band's third album, "The Science of Things" (1999). "Letting the Cables Sleep" is the third and final single from British band Bush's third studio album "The Science of Things", which was released in 1999.  The song became a minor hit, and pushed the album to platinum status.  The song was a bigger hit than its predecessor "Warm Machine", but not nearly as successful as the first single from the album, "The Chemicals Between Us."  The song was featured in the film "" and in the TV series "Charmed" and "Cold Case". Bush are a British rock band formed in London, England in 1992.  Their current lineup includes lead vocalist and rhythm guitarist Gavin Rossdale, lead guitarist Chris Traynor, bassist Corey Britz, and drummer Robin Goodridge. "The People in Me" is a song by the American garage rock band, The Music Machine, written by Sean Bonniwell, and was first released as a track on their debut album "(Turn On) The Music Machine" in December 1966 on Original Sound Records.  The song was also released as the A-side to the group's second single, which was distributed on January 21, 1967.  Like many of Bonniwell's compositions, "The People in Me"'s lyrical content featured a gloomy rebellious mood, with eerie lead vocals by Bonniwell, and it explored with a hard-edged variation of psychedelic rock.  It also featured guitarist Mark Landon's wiry distorted guitar melodies, joined by backing vocals near the conclusion of the song. "Do What U Want" is a song by American singer Lady Gaga, featuring guest vocals from singer R. Kelly.  The song was released to digital outlets on October 21, 2013 as the second single from Gaga's third studio album "Artpop" (2013).  The singers wrote the song with DJ White Shadow, Martin Bresso, and William Grigahcine.  DJ White Shadow first presented Gaga with the song's initial concept two years prior to its release.  The song's production was completed in 2013, with Kelly's vocals added soon after.  A snippet of "Do What U Want" premiered in a Best Buy/Beats by Dr. Dre commercial on October 17.  Warm reception from fans and music critics led to its release as the album's second single. "Warm It Up" was the second single released from Kris Kross' debut album, "Totally Krossed Out".  Produced and written by Jermaine Dupri, "Warm It Up" was released as the follow-up to the duo's multi-platinum chart topping hit, "Jump" on June 4, 1992.  The song became the second consecutive top 15 hit released from the album, reaching 13 on the "Billboard" Hot 100, and #4 in Canada, as well as their second consecutive single to reach #1 on the Rap charts.  "Warm It Up" was certified gold on August 8, 1992.  In 1993 Kids Incorporated covered "Warm It Up" in the Season 9 episode "Secret Admirer". Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pumps and refrigerators.  A heat pump is a machine or device that moves heat from one location (the "source") at a lower temperature to another location (the "sink" or "heat sink") at a higher temperature using mechanical work or a high-temperature heat source.  Thus a heat pump may be thought of as a "heater" if the objective is to warm the heat sink (as when warming the inside of a home on a cold day), or a "refrigerator" if the objective is to cool the heat source (as in the normal operation of a freezer).  In either case, the operating principles are identical.  Heat is moved from a cold place to a warm place. When Saints Go Machine is a Danish electropop band from Copenhagen.  The group consists of four members: Silas Moldenhawer (drums), Jonas Kenton (synth, vocals), Simon Muschinsky (keys) and Nikolaj Manuel Vonsild (vocals).  Moldenhawer and Kenton are also known from their parallel project, Kenton Slash Demon.  When Saints Go Machine brings a more soulful sound than Kenton Slash Demon's rhythmic electro-house music.  When Saints Go Machine was formed in 2007 and debuted with their self-titled EP in 2008.  In May 2009 they released their debut album "Ten Makes a Face".  Their most popular songs are "Fail Forever", "You or The Gang" and "Kids on Vacation". Audioslave was an American rock supergroup formed in Los Angeles in 2001.  The four-piece band consisted of Soundgarden lead singer/rhythm guitarist Chris Cornell and Rage Against the Machine members Tom Morello (lead guitar), Tim Commerford (bass/backing vocals), and Brad Wilk (drums).  Critics first described Audioslave as a combination of Soundgarden and Rage Against the Machine, but by the band's second album, "Out of Exile", it was noted that they had established a separate identity.  Audioslave's sound was created by blending 1970s hard rock with 1990s alternative rock.  Moreover, Morello incorporated his well-known, unconventional guitar solos into the mix.  As with Rage Against the Machine, the band prided themselves on the fact that all sounds on their albums were produced using only guitar, bass, drums, and vocals. Warm is a 1969 album by Herb Alpert & the Tijuana Brass.  It was the group's twelfth release and their final album to reach the top 40 on the "Billboard" albums chart.  "Warm" was a vast departure from all previous Tijuana Brass albums and featured much slower-paced songs leaning more toward a "Brazilian" sound.  At this point in his career, Alpert had grown tired of the music the band was playing feeling that it was repetitive and wanted to try a different direction.  The opening track "The Sea Is My Soil" was one of the longest songs ever released by the Tijuana Brass running four and a half minutes while the song "Without Her" featured Alpert on vocals.  The album received mixed reviews during its initial release but has since become a favorite of many Tijuana Brass fans.
Answer: Gavin Rossdale