Question: "Foil" is a song by an American singer whose favored instrument is what?
Context: Nivea B. Hamilton (born March 24, 1982), who performs under the mononym Nivea, is an American singer whose recordings reached the "Billboard" charts during the early 2000s.  Nivea is known most for her singles "Don't Mess with My Man" and "Laundromat".  She released three studio albums: "Nivea" (2001), "Complicated" (2005) and "Animalistic" (2006) and an independently released extended play "Nivea: Undercover" (2011). "Foil" is a song by American musician "Weird Al" Yankovic from his fourteenth studio album, "Mandatory Fun" (2014).  The song is a parody of the 2013 single "Royals" by Lorde.  The song begins as an ode to the multiple uses of aluminum foil for food storage, but takes a darker turn in its second verse, parodying conspiracy theories, the New World Order, and the Illuminati. Carol Douglas (born April 7, 1948) is an American singer whose hit "Doctor's Orders" (1974) was a pioneer track in the disco genre. Richard Conrad (born 1935) is an American singer whose voice has at times inhabited both the tenor and baritone ranges.  He has sung in opera, cabaret and musicals.  He is perhaps best known for his 1963 recorded collaboration with Joan Sutherland and Marilyn Horne, conducted by Richard Bonynge, known as "The Age of Bel Canto". Koko Taylor (September 28, 1928 – June 3, 2009) was an American singer whose style encompassed many genres.  including Chicago blues, electric blues, rhythm and blues and soul blues.  She was sometimes called "The Queen of the Blues."  She was known for her rough, powerful vocals and traditional blues stylings.  Her name was sometimes styled KoKo Taylor. Steve Taylor & The Perfect Foil is an American alternative rock supergroup formed in 2010 by singer Steve Taylor with drummer Peter Furler (Newsboys, Peter Furler Band), guitarist Jimmy Abegg (Vector, A Ragamuffin Band), and bassist John Mark Painter (Fleming and John).  Taylor formerly saw success as a new wave singer during the 1980s and early 1990s, and also fronted the short-lived band Chagall Guevara.  However, by the mid-1990s he abandoned performing music and transitioned into work as a record producer, songwriter, and film-maker.  In 2010 Taylor, who was frustrated at the slow pace of his fundraiser for his feature film "Blue Like Jazz", collaborated with Furler, Abegg, and Painter to record the song "A Life Preserved" for the film's soundtrack, and began recording other material.  Taylor, Abegg, and Painter then featured on the Peter Furler song "Closer", under the name "Steve Taylor & Some Other Band", on Furler's album "On Fire".  With those collaborations as a starting point, Taylor relaunched his career as a performing musician, and the lineup was branded as Steve Taylor & The Perfect Foil.  The group released a studio album entitled "Goliath" on November 18, 2014 to critical acclaim and modest commercial success.  In 2015, Daniel Smith of Danielson, with whom the band had been touring, temporarily joined on in a collaboration touted as Steve Taylor & The Danielson Foil.  Under this incarnation, the group released the EP "Wow to the Deadness" on February 5, 2016, and toured until February 12. Rhett Brewer is a British-based composer and singer whose career began with the release of the collaborative album "These Wings Without Feather"s with Lisa Gerrard, and has since become a regular composer for film.  In 2006, Brewer began the new project "Hotel de Ville", which resulted in an album of the same name.  He is best known for his mix of Classical music with music of Non-Western origin and Electronic elements, as well as the use of his own original voice as an instrument. Alfred Aholo Apaka, Jr. (March 19, 1919 – January 30, 1960) was an American singer whose romantic baritone voice was closely identified with Hawaii between the late 1940s and the early 1960s.  Alfred Apaka was arguably the foremost interpreter of Hapa haole music, which melded Hawaiian music with traditional pop music arrangements and English lyrics to convey Polynesian imagery and themes. Alfred Matthew "Weird Al" Yankovic ( ; born October 23, 1959) is an American singer, songwriter, parodist, record producer, satirist, actor, voice actor, music video director, film producer, and author.  He is known for his humorous songs that make light of popular culture and often parody specific songs by contemporary musical acts, original songs that are style pastiches of the work of other acts, and polka medleys of several popular songs, featuring his favored instrument, the accordion. Krista Branch is an American singer whose 2010 song "I Am America" has been called the anthem of the Tea Party movement.  Branch produced "I Am America" with her husband, who wrote the song, to protest the treatment of the Tea Party by Democrats.  After being uploaded to YouTube, the song was aired on Glenn Beck's radio show and it quickly grew in popularity.  It was subsequently performed on Fox News and at events across the country.  A former "American Idol" contestant, Branch was eliminated early in the process.
Answer: accordion