Question:  B Sides and Rarities is a compilation album by American pop singer Andy Williams that included a cover of a song originally recorded by who?

full_context: Document 1: Band of Brothers (Only Men Aloud! album): Band of Brothers is the second studio album by the choir Only Men Aloud!. Unlike their self-titled debut, it featured several traditional Welsh songs, the album closing with a version of "Land of My Fathers". However, as on the first album, the choir also included covers of pop songs "Total Eclipse of the Heart", a duet with the original singer Bonnie Tyler, "Somebody to Love" with featured vocalist Kerry Ellis, and "Scarborough Fair".
Document 2: He Ain't Heavy, He's My Brother: "He Ain't Heavy, He's My Brother" is a popular music ballad written by Bobby Scott and Bob Russell. Originally recorded by Kelly Gordon in 1969, the song became a worldwide hit for The Hollies later that year and again for Neil Diamond in 1970. It has been covered by many artists in subsequent years. The Hollies' and Rufus Wainwright's versions of the song were featured in the film "Zoolander".
Document 3: The Impossible Dream (Andy Williams album): The Impossible Dream is a double compilation album by American pop singer Andy Williams that was released in late 1971 by Columbia Records. Unlike his most recent compilation, "Andy Williams' Greatest Hits", this 2-LP set focused exclusively on covers of songs made famous by other artists and included four tracks ("He Ain't Heavy, He's My Brother", "The Last Time I Saw Her", "Long, Long Time", and "Someone Who Cares") that had previously only been available on his UK album titled "Love Story". In 2003 these tracks were released on the Williams collection from Collectables Records titled "B Sides and Rarities".
Document 4: Hudson Brothers: The Hudson Brothers is an American music group formed in Portland, Oregon in the 1970s and consisting of Bill Hudson, Brett Hudson and Mark Hudson. Their popular songs have included "So You Are a Star" (1974), "Rendezvous" (1975), "Lonely School Year" (1975), and "Help Wanted" (1976).
Document 5: He Ain't Heavy, He's My Uncle: "He Ain't Heavy, He's My Uncle" is an episode of the BBC sitcom "Only Fools and Horses". It was the fifth episode of series 7, and was first broadcast on 27 January 1991. The title of the episode is derived from the song "He Ain't Heavy, He's My Brother". In the episode, Uncle Albert is mugged and, thinking he's become a burden, decides to leave Nelson Mandela House.
Document 6: Watching Scotty Grow: "Watching Scotty Grow" is a song written by country music singer-songwriter Mac Davis. Although featured on Davis' 1972 album "I Believe in Music", a more famous version of the song was performed by Bobby Goldsboro in 1970 and included on Goldsboro's album "We Gotta Start Lovin".
Document 7: Greatest Hits (Andy Williams album): Greatest Hits is a live/compilation album by American pop singer Andy Williams that was digitally recorded live in concert at the Andy Williams Moon River Theater in Branson, Missouri and released by the LaserLight division of Delta Music Inc. in 1994. It includes performances of songs that he had previously recorded during his time with the Cadence and Columbia labels as well as one he had never recorded before -- "L-O-V-E", which Nat King Cole took to number 81 pop and number 17 Easy Listening in "Billboard" magazine in 1964.
Document 8: Hollies Sing Hollies: Hollies Sing Hollies is the ninth studio album released in England by The Hollies. It was released in November 1969 by Parlophone, their second album that year coming 6 months after an entire album of Bob Dylan covers. It was their first album of original compositions since the departure of Graham Nash and the second album by The Hollies to feature Terry Sylvester, on rhythm guitar and first to feature Terry Sylvester compositions as well as an instrumental composition by bassist Bernie Calvert. The U.S. version, titled "He Ain't Heavy, He's My Brother", included the hit single by the same name, while omitting the tracks "Soldier's Dilemma" and "Marigold: Gloria Swansong". The UK album did not chart, but its U.S. version peaked at #32.
Document 9: The Very Best of Andy Williams (2009 album): The Very Best of Andy Williams is a compilation album by American pop singer Andy Williams that was released in the UK on October 5th, 2009. A note from Williams inside the CD booklet explains that the album "was put together to coincide with my memoir "Moon River and Me", published by Orion Press. It includes many of the songs that you made hits. I truly appreciate that, and I hope you enjoy the songs we selected for this CD." This compilation includes recordings that either charted in the UK but not in the US ("Can't Take My Eyes off You", "It's So Easy", "May Each Day") or charted much higher on the UK singles chart than they did on the "Billboard" Hot 100 in the US ("Almost There", "Can't Help Falling in Love"). It entered the UK albums chart on October 17, 2009, and reached number 10 during its six weeks there.
Document 10: B Sides and Rarities (Andy Williams album): B Sides and Rarities is a compilation album by American pop singer Andy Williams that was released by Collectables Records on May 27, 2003. Although the collection starts out with two 1947 recordings by Kay Thompson and The Williams Brothers, the rest of the material comes from his time at Columbia Records and includes covers of contemporary hits ("Cherish", "If You Could Read My Mind", "He Ain't Heavy, He's My Brother") as well as lesser-known material from the songwriters of "Can't Get Used to Losing You", "Home Lovin' Man", and "Moon River".
Document 11: Bridge over Troubled Water (song): "Bridge over Troubled Water" is a song by American music duo Simon & Garfunkel. Produced by the duo and Roy Halee, the song was released as the follow-up single to "The Boxer" in January 1970. The song is featured on their fifth studio album, "Bridge over Troubled Water" (1970). Composed by singer-songwriter Paul Simon, the song is performed on piano and carries the influence of gospel music. The original studio recording employs elements of Phil Spector's "Wall of Sound" technique using L.A. session musicians from the Wrecking Crew.
Document 12: The Essential Andy Williams: The Essential Andy Williams is a compilation album by American pop singer Andy Williams that was released in the UK by Sony Music Entertainment in 2002. The label also released a two-CD compilation with the same title in the U.S. in 2002 that had a different cover photo and track listing.
Document 13: Andy Williams' Greatest Hits: Andy Williams' Greatest Hits is a compilation album by American pop singer Andy Williams that was released in early 1970 by Columbia Records. It was not, however, as its title might suggest, strictly a hit singles compilation, although some of his biggest songs since joining Columbia (such as the easy listening number ones "Can't Get Used to Losing You" and "Happy Heart") were included. A couple of selections ("Born Free" and "More") were never released as singles by Williams, and his signature song, "Moon River", was released in the 7-inch single format but only for jukeboxes. His six Cadence singles that made the Top 10 on "Billboard" magazine's Hot 100 are passed over for the inclusion of his number 11 hit from that label, "The Hawaiian Wedding Song", and 17 of his Columbia recordings that made the Hot 100 up until 1970 are left out here in favor of "Charade", which spent its one week on the chart at number 100.
Document 14: Andy Williams' Greatest Hits Vol. 2: Andy Williams' Greatest Hits Vol. 2 is a compilation album by American pop singer Andy Williams that was released in June 1973 by Columbia Records. This collection follows in the footsteps of its predecessor, "Andy Williams' Greatest Hits", in that it is not limited to his biggest and most recent hit singles, although his final two US Top 40 entries ("(Where Do I Begin) Love Story" and "Speak Softly Love (Love Theme from 'The Godfather')") were included. It also has an album track not released as a single ("The Impossible Dream (The Quest)"), a couple of hits from his time with Cadence Records ("Lonely Street" and "The Village of St. Bernadette"), two other singles that could have been included on the first volume ("In the Arms of Love" and "Music to Watch Girls By"), and two Easy Listening chart entries that never made the "Billboard" Hot 100 ("Home Lovin' Man" and "Music from Across the Way").
Document 15: Brother, Brother, Brother: Brother, Brother, Brother is the tenth album released by The Isley Brothers on their T-Neck imprint on May 2, 1972. It was to be the Isleys' last studio record with Buddah Records moving on to Epic in the middle of 1973. This album also was the first to bring the younger half of the Isleys: guitarist Ernie Isley, bassist Marvin Isley and keyboardist Chris Jasper into the fold alongside their older brethren: lead singer Ronald Isley and background singing elder brothers O'Kelly Isley, Jr. and Rudolph Isley. Their second venture into rock music, they didn't betray their soul and funk roots. The album featured the top 40 hit, "Pop That Thang", and subsequent hits "Work to Do", "Lay-Away" and their cover of Carole King's "It's Too Late". The brothers also covered two more King songs including the title track and "Sweet Seasons".
ground_truth: Kelly Gordon