Question: Evian Christ worked on the album Yeezus for which famous American rapper?
Context: Joshua Leary (born 11 June 1989), better known by the stage name Evian Christ, is an English electronic music producer, DJ and songwriter from Ellesmere Port, UK.  He is signed to Tri Angle Records and to Kanye West’s publishing house, DONDA.  He released his debut mixtape "Kings and Them" in 2012 and gained prominence as a collaborator on West's 2013 album "Yeezus".  He released a further EP on Tri Angle, "Waterfall", in 2014. The Yeezus Tour was a concert tour by American rapper Kanye West in support of West's sixth solo studio album, "Yeezus" (2013).  The venture served as West's first solo concert tour in five years.  Kendrick Lamar, A Tribe Called Quest, Travi$ Scott, and Pusha T served as opening acts on select dates.  It had the second highest grossing leg of a tour during 2013, behind Paul McCartney's "Out There!  Tour". "Black Skinhead" (also stylized as "BLKKK SKKKN HEAD") is a song by American rapper Kanye West, from his sixth studio album "Yeezus" (2013).  The song, produced by West and Daft Punk, with additional production by Gesaffelstein, Brodinski, Mike Dean, Lupe Fiasco, No ID, Jack Donoghue and Noah Goldstein. Yeezus is the sixth studio album by American rapper Kanye West.  It was released on June 18, 2013, by Def Jam Recordings.  West gathered a number of artists and close collaborators for production on the album, including Mike Dean, Daft Punk, Noah Goldstein, Hudson Mohawke, Arca, and Travis Scott.  "Yeezus" also features guest vocals from Justin Vernon, Chief Keef, Kid Cudi, Assassin, King L, Charlie Wilson and Frank Ocean.  Fifteen days before its release date, West enlisted the help of producer Rick Rubin to strip down the record's sound in favor of a more minimalist approach. "On Sight" is a song by American rapper Kanye West, from his sixth solo studio album "Yeezus".  It was produced by West, Benji B, Daft Punk and Mike Dean.  "On Sight" contains interpolations of "Sermon (He'll Give Us What We Really Need)", written by Keith Carter, Sr., and performed by Holy Name of Mary Choral Family.  However, West assembled a new choir to sing the song for the album. Kanye Omari West ( ; born June 8, 1977) is an American rapper, singer, songwriter, record producer, fashion designer, and entrepreneur.  Born in Atlanta and raised in Chicago, West briefly attended art school before becoming known as a producer for Roc-A-Fella Records in the early 2000s, producing hit singles for artists such as Jay-Z and Alicia Keys.  Intent on pursuing a solo career as a rapper, West released his debut album "The College Dropout" in 2004 to widespread critical and commercial success, and founded the record label GOOD Music.  He went on to pursue a variety of styles on subsequent albums "Late Registration" (2005), "Graduation" (2007), and "808s & Heartbreak" (2008).  In 2010, he released his fifth album "My Beautiful Dark Twisted Fantasy" to rave reviews from critics, and the following year he released the collaborative album "Watch the Throne" with Jay-Z.  West released his abrasive sixth album, "Yeezus", to further critical praise in 2013.  His seventh album, "The Life of Pablo", was released in 2016. Wilson David "Buster" Charles, Jr. (April 4, 1908 – June 6, 2006) was a Native American athlete who finished fourth in the decathlon at the 1932 Summer Olympics.  He also competed nationally in basketball and American football.  After retiring from sports he worked as an engineer in Phoenix, Arizona.  He was inducted into the National Hall of Fame for Famous American Indians. Riot Boi is the debut studio album by New York-based rapper Le1f.  It was released on November 13, 2015 on XL and Terrible Records.  The album features contributions and production work from artists such as Evian Christ, Junglepussy, Balam Acab, Lunice, Boody, Sophie, and Dev Hynes. "Bound 2" is a song by American rapper Kanye West, featured as the final track from his sixth studio album, "Yeezus" (2013).  It was produced by West and Che Pope, with additional production being handled by Eric Danchick, Noah Goldstein, No ID and Mike Dean.  The song features vocals from American soul singer Charlie Wilson and serves as the album's second single.  "Bound 2" incorporates samples from "Bound" by Ponderosa Twins Plus One and the line "Uh-huh, honey" from Brenda Lee's "Sweet Nothin's". Mike Lévy, better known as Gesaffelstein (born 1985 in Lyon, France), is a French techno artist and DJ.  He has worked alongside, and remixed tracks for such artists as varied as Tiga, Miss Kittin, ASAP Rocky, Lana Del Rey and Phoenix.  He produced two tracks on "Yeezus", the sixth album of American rapper Kanye West, including the lead single "Black Skinhead" and "Send It Up", both tracks produced with Kanye West, Daft Punk, Brodinski and Mike Dean.  Gesaffelstein released his debut album "ALEPH" on October 28, 2013 under Parlophone Records and EMI Music, which had been recorded since 2011.  His remix of "Shockwave" by The Hacker is featured in the 2013 video game "Grand Theft Auto V", on the Soulwax FM radio station.  In 2015 Gesaffelstein released the track Conquistador in collaboration with French electronic music pioneer Jean-Michel Jarre.
Answer: Kanye West