Question: CeeLo Green and Han Seung-yeon are both what?

full_context: Document 1: Cee-Lo Green and His Perfect Imperfections: Cee-Lo Green and His Perfect Imperfections is the debut studio album by American hip hop musician Cee Lo Green, released on April 23, 2002. The album features guest appearances from Jahalla, Kirkland Underground, John Popper (of Blues Traveler), Joey Huffman and fellow Dungeon Family rappers Big Gipp and Backbone.
Document 2: Kim Tae-yeon: Kim Tae-yeon (born March 9, 1989), referred to as Taeyeon, is a South Korean singer. She had been a trainee at S.M. Entertainment's Starlight Academy during her middle school years before debuting as a member of the agency's girl group, Girls' Generation, in 2007. Since then, she has risen to prominence due to the group's success on the Asian music scene and further participated in the agency's projects Girls' Generation-TTS and SM the Ballad. Aside from group activities, she has also recorded songs for various television dramas and movies.
Document 3: Seohyun: Seo Ju-hyun (born June 28, 1991), known professionally as Seohyun, is a South Korean singer and actress. She debuted as a member of girl group Girls' Generation (and later its subgroup TTS) in August 2007, who went on to be one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide. Apart from her group's activities, she has established herself as an actress, notably through her participation in the original and Korean versions of stage musicals including "Moon Embracing the Sun", "Gone with the Wind" and "Mamma Mia". She also starred in the drama "". She debuted as a solo artist with her debut mini album, "Don't Say No", on January 17, 2017, making her the third Girls' Generation member to debut as a solo artist.
Document 4: Donald Glover: Donald McKinley Glover (born September 25, 1983) is an American actor, writer, producer, director, rapper, singer, and songwriter. He performs as a stage artist under the stage name Childish Gambino, and as a disc jockey, he performs under the name mcDJ.
Document 5: The Lady Killer (album): The Lady Killer is the third studio album by American singer CeeLo Green. It was released November 5, 2010, by Elektra Records. Production for the album was handled by Salaam Remi, Element, The Smeezingtons, Fraser T Smith, Paul Epworth, and Jack Splash.
Document 6: Caleb Green: Master sergeant Caleb B. Green III is a solo vocalist with the United States Army Band. An accomplished performer, particularly of the US national anthem, Green is often called upon to sing at important sporting events, diplomatic functions and military ceremonies. His most notable anthem performance was at the at the Lincoln Memorial in Washington, D.C.. Prior to this his most notable outing was onstage in the TNT production "Christmas in Washington 2008", in which he sang "O Holy Night".
Document 7: Seo Yu-na: Seo Yu-na (born December 30, 1992), better known by the mononym Yuna, is a South Korean singer and actress. She is a member of the South Korean girl group AOA and its sub-groups, AOA Black and AOA Cream.
Document 8: CeeLo Green's The Good Life: CeeLo Green's The Good Life is an American comedy series created and hosted by CeeLo Green. It premiered on TBS on June 23, 2014. It was cancelled by TBS on September 2, 2014.
Document 9: Professor Green: Stephen Paul Manderson (born 27 November 1983), better known by his stage name Professor Green or simply Pro Green, is a British rapper, singer, songwriter, actor and television personality from London. He is the co-host of "Lip Sync Battle UK" on Channel 5.
Document 10: Kang Seung-yoon: Kang Seung-yoon (born (1994--) 21, 1994 ), known as Seungyoon, is a South Korean singer-songwriter, record producer, actor, and leader of boy group Winner. In 2010, he participated in the reality television singing contest "Superstar K2" and finished in fourth place. In January 2011, he became a trainee under YG Entertainment and went on to debut as a solo artist in July 2013 and as the leader of Winner in October 2013.
Document 11: Han Seung-yeon: Han Seung-yeon (born July 24, 1988), better known mononymously as Seungyeon, is a South Korean singer and actress. She is best known as former main vocalist of the South Korean girl group Kara.
Document 12: Park Gyu-ri: Park Gyu-ri (born May 21, 1988), better known by the mononym Gyuri, is a South Korean singer, actress, and radio personality. She was a member of South Korean girl group Kara.
Document 13: Im Yoon-ah: Im Yoon-ah (Hangul: 임윤아 ; born May 30, 1990), better known by the mononym Yoona, is a South Korean singer and actress. She debuted as a member of girl group Girls' Generation in August 2007, who went on to become one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide.
Document 14: Seohyun discography: Seohyun (born Seo Joo-hyun) is a South Korean singer, member of Girls' Generation and its subgroup Girls' Generation-TTS. Since debuting in 2007, she has collaborated with various artists and released several original soundtracks for South Korean TV series. Her career as a solo singer began in January 2017 with the release of her debut extended play "Don't Say No".
Document 15: CeeLo Green: Thomas DeCarlo Callaway (born May 30, 1975), better known by his stage name CeeLo Green (sometimes rendered as Cee Lo Green), is an American singer, songwriter, rapper, record producer and actor.
ground_truth: singer