Question: which American singer, songwriter, musician and actor was part of the performance of 2012 Soul Train Music Awards show?

Context paragraphs:
2006 Soul Train Music Awards: The 2006 Soul Train Music Awards were held on March 18, 2006 at the Pasadena Conference Center in Pasadena, California and was hosted by Vivica Fox and Tyrese.  The show marked the 20th Anniversary of the Soul Train Music Awards.

Soul Train Music Award for Best New Artist: This page lists the winners and nominees for the Soul Train Music Award for Best New Artist.  The award has been given out every year since the first annual Soul Train Music Awards in 1987.

Soul Train Music Awards: The Soul Train Music Awards is an annual award show which previously aired in national television syndication, and honors the best in Black music and entertainment.  It is produced by the makers of "Soul Train", the program from which it takes its name, and features musical performances by various R&B and Soul recording artists interspersed throughout the ceremonies.  The special traditionally used to air in either February, March or April, but now airs the last weekend of November (in most years, Thanksgiving weekend).

2013 Soul Train Music Awards: The 2013 Soul Train Music Awards ceremony took place on December 1, 2013 at the Orleans Arena in Paradise, Nevada and was hosted by comedian and actor Anthony Anderson.  The ceremony was aired on BET and Centric and included special tributes to Dionne Warwick, who received the Soul Train Legend Award and Keith Sweat given the Lifetime Achievement Award.

Milton Brunson: Milton R. Brunson (June 28, 1929 – April 1, 1997) was an American gospel musician and former pastor and music director of Christ Tabernacle Baptist Church in Chicago, Illinois.  Rev. Milton Brunson released his first musical project in 1988, "Available to You" with Word Records alongside Epic Records.  The last album, "When You Get High on Jesus, Oh My God", released in 1997 by Hob Records, and this was a posthumous release.  The last album to chart was "50 Blessed Years", that charted on the "Billboard" charts.  All-in-all, he has had ten albums that have charted on the "Billboard" Gospel Albums chart over the course of his career and some even after his death.  He received a nomination for the Best Gospel Album, Group or Choir at the 1988 Soul Train Music Awards and for Best Gospel Album at the 1993 Soul Train Music Awards.  He won a Grammy Award for Best Gospel Choir or Chorus Album at the 37th Annual Grammy Awards, while he was nominated two other times.

John Legend: John Roger Stephens (born December 28, 1978), known professionally as John Legend, is an American singer, songwriter, musician and actor.

Jennifer Decilveo: Jennifer Decilveo is an American Grammy-nominated songwriter and producer based in Los Angeles.  She has written and produced for numerous artists including Melanie Martinez, Ryn Weaver's "The Fool" and Andra Day on her critically acclaimed album "Cheers to the Fall".  The album was nominated for Best R&B Album and the album's main single, "Rise Up", was nominated for Best R&B Performance at the 2016 Grammy Awards.  Decilveo and Day are winners of BET's 2016 Soul Train Music Awards The Ashford & Simpson Songwriter's Award.

2012 Soul Train Music Awards: The 2012 Soul Train Music Awards were held at Planet Hollywood in Las Vegas, Nevada on November 25, 2012.  The show was hosted by actor/comedian Cedric the Entertainer.  Performers included New Edition, Miguel, Ne-Yo, Keyshia Cole, Tyrese, Elle Varner, John Legend, 2 Chainz, Stevie Wonder, Eddie Levert, Charlie Wilson, Fantasia, Anthony Hamilton, and Marcus Canty.  The evening also featured a tribute to the late "Soul Train" creator Don Cornelius.

Glodean White: Glodean Beverly White (born Glodean Beverly James, October 16, 1946) is an American R&B singer, who was married to Barry White.  In the 1980s, Glodean White made numerous appearances on "Soul Train" and the "Soul Train Music Awards".  She was also part of the singing trio, Love Unlimited. Glodean White was also known to grow out her fingernails.

2011 Soul Train Music Awards: The 2011 Soul Train Music Awards was aired on November 27, 2011 on BET and Centric.  The award ceremony was hosted by comedian and actor Cedric the Entertainer.  The ceremony included special tributes to Gladys Knight and Earth Wind & Fire, both honorees received the Soul Train Legend Award.  A special tribute performance was dedicated in memory of hip hop artist Heavy D, which include Doug E. Fresh, Kurtis Blow, and Whodini, Common and Naughty by Nature.

Supporting paragraphs: 2012 Soul Train Music Awards John Legend
Answer: John Roger Stephens