Iarla Ó Lionáird (born 18 June 1964) is an Irish singer and record producer.
 He sings in the traditional sean-nós style.
 He was a member of the Afro Celt Sound System and is a member of the Irish-American supergroup The Gloaming.
 He has recorded several solo albums for Real World Records.
 He appeared in the 2015 film "Brooklyn" singing an a cappella version of the Irish folk song "Casadh an tSugain".
Maa is the eighth album of Finnish a cappella ensemble Rajaton released in 2007 in celebration of the ensemble's 10th anniversary.
 "Maa", is a Finnish word which, depending on context, can be translated to mean "country", "earth", "land", "ground" or "soil".
 The name is in reference to the 'back to the roots' nature of the album - Rajaton's debut album, "Nova", similarly consisted of songs composed to Finnish poetry.
 <br>A new a cappella version of the Jean Sibelius orchestral piece "Valse triste" is also included, marking the 50th anniversary of his death.
The Go-Katz are a British psychobilly band formed in Loughborough, Leicestershire in 1986.
 The original members were Howard Raucous (real name Howard Piperides) on vocals, Beaker (real name Giles Brett) on guitar, Andy Young (guitar), Moff (real name Mark Moffat) on Double Bass, and Wolf (real name John Basford) on drums.
 The band members have formerly made up Loughborough bands The Exorcists and The Go-Go Dakotas.
The Grey Album is a mashup album by Danger Mouse, released in 2004.
 It mixes an a cappella version of rapper Jay-Z's "The Black Album" with samples from The Beatles' LP "The Beatles", commonly known as "The White Album".
 "The Grey Album" gained notoriety when EMI attempted to halt its distribution despite approval of the project from Jay-Z and the two surviving Beatles, Paul McCartney and Ringo Starr.
Minyan Man is a song composed by Victor Shine in 1982.
 Lenny Solomon of Shlock Rock revised and popularized the song.
 Noted Jewish musician, Gershon Veroba sang on Solomon's updated version as well.
 In May 2015, Lenny Solomon rerecorded an a cappella version with The Maccabeats.
 In promotion of the newly recorded version, Uri westrich produced a music video.
 "Minyan Man" was also covered by Yidcore, an Australian punk rock Jewish group.The song tells the fictional story of man out of town of business who is looking for a minyan for Shabbat in the small Jewish community of Mobile, AL.
"Heaven" is a song by John Legend from the album, "Once Again" (2006).
 It was written and produced by himself and musician Kanye West and released as the album's second single in fall 2006.
 The remix of the song, released to the iTunes Store in February 2007, features Pusha T.
 A special EP also features the a cappella version of the remix, the album version and the instrumental of "Heaven".
"Boxing" is a song from Ben Folds Five's 1995 self-titled debut album.
 It was written by Ben Folds.
 A live version appears on the 1998 album "Naked Baby Photos".
 The song also appears in a solo version by Folds on the 2005 download-only album "iTunes Originals - Ben Folds" and in a symphonic version with the West Australian Symphony Orchestra on the 2005 DVD "Ben Folds and WASO Live in Perth", and in an a cappella version on "".
Brian Joseph Burton (born July 29, 1977), better known by his stage name Danger Mouse, is an American musician, songwriter and record producer.
 He came to prominence in 2004 when he released "The Grey Album", which combined vocal performances from Jay-Z's "The Black Album" with instrumentals from The Beatles' "The Beatles (aka the White Album)".
Simply Eva is the eighth posthumous album by Eva Cassidy, released on 25 January 2011, fifteen years after her death in 1996.
 It's a collection of 11 acoustic tracks with Cassidy herself on the guitar and an a cappella version of "I Know You By Heart".
 The Blues Alley version of "Over the Rainbow", which was not included in the "Live at Blues Alley" album, will be in this album.
 Digital downloads will include the Christmas single "Silent Night" as a bonus track.
 "Simply Eva" hit #4 on the UK Charts on February 13, 2011, and was certified silver and gold on February 18, 2011.
 The album debuted at #52 on the Canadian Albums Chart.
"Homophobia" is a song from Chumbawamba's album "Anarchy", concerning the topic of modern homophobia.
 It remained a regular part of Chumbawamba's live set, usually in an a cappella version, from its initial release in 1994 up to the band's retirement in 2012.
 This arrangement was performed on their 1994 live album Showbusiness!
.
 The version released as a single is very different from the album and live versions, having an upbeat synthesised backing, altered lyrics, and backing vocals by the Sisters of Perpetual Indulgence.

Question: What is the real name of the person who released the cappella version of Jay-Z?
Answer: Brian Joseph Burton