Question: What profession does Kim Sung-kyu and Charlie Wilson have in common?

Context paragraphs:
Charlie Wilson (singer): Charles Kent "Charlie" Wilson (born January 29, 1953), also known as Uncle Charlie, is an American R&B singer, songwriter, producer and the former lead vocalist for The Gap Band.  As a solo artist he has been nominated for eleven Grammy awards and six NAACP Image Awards (including one win), received a 2009 Soul Train Icon Award, and was a recipient of a BMI Icon Award in 2005.  In 2009, he was named "Billboard" magazine's No. 1 Adult R&B Artist, and his song "There Goes My Baby" was named the No. 1 Urban Adult Song for 2009 in "Billboard" Magazine.

Jason Wilson (politician): Jason Wilson (born August 12, 1968 in Martins Ferry, Ohio) is a Democratic politician who was a member of the Ohio Senate, representing the 30th District from his appointment in January 2007 to November 2011.  He serves as the Director of the Governor's Office of Appalachia.  Wilson is the son of former Ohio Senator and United States Congressman Charlie Wilson.

Just Charlie: Just Charlie is the fifth studio album by singer Charlie Wilson.  It was released on December 3, 2010.  It features the hit single, "You Are", which garnered Wilson with a career high debut on the "Billboard" Hot R&B/Hip Hop Songs, and reached No. 1 on the "Billboard" Urban Adult Contemporary Chart.  "You Are" remained No. 1 for 13 weeks on the "Billboard" UAC Chart and No. 1 for 15 weeks straight at the Mediabase equivalent, climbing to No. 16 on the "Billboard" Hot R&B/Hip-Hop Songs chart, No. 7 on the Heatseeker Songs chart, No. 19 on the Christian Songs chart, and No. 64 on Radio Songs chart.  Singer Fantasia is the only featured guest on the album, who appears on a remake of the famous Roger Troutman classic, "I Want to Be Your Man".  The album debuted on the "Billboard" 200 at No. 19 and No. 2 on the "Billboard" R&B Album chart selling 57,286 copies in its first week.

Charlie, Last Name Wilson: Charlie, Last Name Wilson is the third studio album by American singer Charlie Wilson; it was released on August 23, 2005, by Jive Records.  The album includes production from several R&B hitmakers including R. Kelly, will.i.am, Justin Timberlake, KayGee & Terence "Tramp-Baby" Abney, The Underdogs and The Platinum Brothers.

27 (Kim Sung-kyu EP): 27 is the second extended play by South Korean singer, Kim Sung-kyu.  It was released on 11 May 2015.  The album release double title tracks as the lead singles, The Answer (너여야만 해) and Kontrol.

Another Me (Kim Sung-kyu EP): Another Me is the debut extended play by South Korean singer, Kim Sung-kyu.  It was released on November 19, 2012 by Woollim Entertainment.  Kim Sungkyu releasing pre-release track "Shine" on November 7 before this album release on November 19.

Download (song): "Download" is a promotional single by rapper Lil' Kim.  It features R&B singers T-Pain and Charlie Wilson and was written by Lil' Kim and T-Pain and produced by Trackmasters.  The song samples "Computer Love" by Zapp.  It peaked at number 21 on the "Billboard" Hot R&B/Hip-Hop Songs chart.

Charlie Wilson's War (film): Charlie Wilson's War is a 2007 American comedy-drama film, based on the story of U.S. Congressman Charlie Wilson and CIA operative Gust Avrakotos, whose efforts led to Operation Cyclone, a program to organize and support the Afghan mujahideen during the Soviet–Afghan War.

Kim Sung-kyu: Kim Sung-kyu (born April 28, 1989), referred to as Sunggyu or Sungkyu, is a South Korean singer and actor.  He is the leader and main vocalist of South Korean boy band Infinite.

The Platinum Brothers: The Platinum Brothers are an American record production duo based in Atlanta, Georgia.  Consisting of Adam Gibbs and Mike Chesser, the duo produced "Let's Chill" and "So Hot" from Charlie Wilson's album Charlie, Last Name Wilson which has gone on to sell over 300,000 copies.

Supporting paragraphs: Kim Sung-kyu Charlie Wilson (singer)
Answer: singer