Question: Dan Elkan has appeared on recordings by what American singer who has sold more than 50 million records worldwide?

Context paragraphs:
Kelly Rowland discography: American recording artist Kelly Rowland has released four studio albums, two compilation albums, one box set, two extended plays and forty-four singles, including twenty as a featured artist and five promotional singles. Rowland began her career in 1997 with one of the best-selling girl groups, Destiny's Child, who have sold around 60 million records worldwide.  As a solo artist, Rowland has sold 40 million records worldwide.

Culture Club discography: Culture Club discography consists of 5 studio albums, 10 compilation albums, 3 box sets, 3 extended plays, 20 regular commercial singles and 5 promotional singles released throughout the 1980s and 1990s.  Culture Club sold more than 50 million records worldwide, including 6.5 million records in the United States.

Bret Michaels: Bret Michael Sychak (born March 15, 1963), professionally known as Bret Michaels, is an American singer-songwriter and musician.  He gained fame as the lead singer of the glam metal band Poison who have sold over 50 million records worldwide and 15 million records in the United States alone.  The band has also charted ten singles to the Top 40 of the "Billboard" Hot 100, including six Top 10 singles and a number-one single, "Every Rose Has Its Thorn".

MC Hammer discography: MC Hammer or simply Hammer (born Stanley Kirk Burrell) is known for hit records including "U Can't Touch This", "Pray" and "2 Legit 2 Quit" as well as his flashy dance movements, choreography and Hammer pants.  His superstar-status and entertaining showmanship made him a household name and hip hop icon.  Hammer has sold about 30 million albums in the US alone.  He has sold more than 50 million records worldwide, breaking down numerous doors for rap music and demonstrating that hip-hop had the potential for blockbuster success.  A multi-award winner, M.C. Hammer is considered a "forefather/pioneer" and innovator of pop rap (incorporating elements of ), and is the first hip hop artist to achieve diamond status for an album.

Judith Durham: Judith Mavis Durham (born Judith Mavis Cock; 3 July 1943) is an Australian singer and musician who became the lead singer for the Australian popular folk music group The Seekers in 1963.  The group subsequently became the first Australian pop music group to achieve major chart and sales success in the United Kingdom and the United States, and have sold over 50 million records worldwide.  Durham left the group in mid-1968 to pursue her solo career.  In 1993, Durham began to make sporadic recordings and performances with The Seekers, though she remains primarily a solo performer.

Broken Bells: Broken Bells is an American indie rock band composed of artist-producer Brian Burton (better known as Danger Mouse) and James Mercer, the lead vocalist and guitarist for the indie rock band The Shins.  Broken Bells compose and create as a duo, but are joined by Dan Elkan and Jon Sortland when performing live.  The previous live band included Conor Oberst and the Mystic Valley Band sidemen Nate Walcott and Nik Freitas, and Jonathan Hischke and Dan Elkan, both ex-members of Hella.  Following their 2010 self-titled debut album, the duo released an EP, "Meyrin Fields", in 2011 and their second studio album, "After the Disco", on February 4, 2014.

Culture Club: Culture Club are an English band that was formed in 1981.  The band comprised Boy George (lead vocals), Roy Hay (guitar and keyboards), Mikey Craig (bass guitar) and Jon Moss (drums and percussion).  They are considered one of the most representative and influential groups of the 1980s.  Culture Club sold more than 50 million records worldwide, including 7 million records awards RIAA certificate in the United States.

List of awards and nominations received by Xuxa: This is a list of awards and nominations received by Xuxa a Brazilian singer, TV host and actress.  She began her career in 1985 in PolyGram with álbum "Xuxa e Seus Amigos", and has been the most popular Latin acts in the world since the mid-1980s.  Xuxa has sold 50 million records worldwide.  Becoming one of Latin singers who sold more albums in the 20th century, winning several awards including 2 Latin Grammy Awards.

Norah Jones: Norah Jones (born Geetali Norah Shankar; March 30, 1979) is an American singer, songwriter and actress.  She has won numerous awards and has sold more than 50 million records worldwide.  "Billboard" named her the top jazz artist of the 2000–2009 decade.  She has won nine Grammy Awards and was 60th on "Billboard" magazine's artists of the 2000–2009 decade chart.

Dan Elkan: Dan Elkan (born September 7, 1978) is an American singer-songwriter and producer, who is best known as the singer and guitarist for the rock band Them Hills.  Elkan has performed live with Broken Bells, Hella and Kim Deal and has appeared on recordings by Hella, Team Sleep, Norah Jones and Zach Hill.  Elkan produced Aaron Ross' 2007 album "Shapeshifter" and tracks for Golden Shoulders' "Get Reasonable" 2009.  Elkan also co-produced Zach Hill & Holy Smokes' "Masculine Drugs" 2004 and Holy Smokes' "Talk to Your Kids about Gangs" 2006 as well as Alela Diane's 2009 album "To Be Still".

Supporting paragraphs: Dan Elkan Norah Jones
Answer: Norah Jones