Question:  "what U need?"  is a single, recorded by which Chinese singer, for his debut extended play "Lose Control" , Zhang Yixing (born (1991--) 07, 1991 ), better known by his stage name, which is?
Context: "what U need?"  is a single recorded by Chinese singer Lay for his debut extended play "Lose Control" .  It was pre-released on October 7, 2016 by S.M. Entertainment as a birthday gift for Lay's fans. "Lose Control" is a single recorded by Chinese singer Lay for his debut extended play "Lose Control".  The song was released on October 28, 2016 by S.M. Entertainment. The discography of Chinese singer Lay (Zhang Yixing), consists of one extended play, four singles and three appearances in soundtracks.  In May 2016, he released his first solo single called "Monodrama" for the Station project.  Lay made his official solo debut on October 7, 2016 with the release of the song "what U need?" .  His first extended play, titled "Lose Control", was released on October 28 of the same year.  The EP was a commercial success peaking at number 1 on the Gaon Album Chart and 7th of Joram Metekohy, (born January 7, 1983) better known by his stage name Wildstylez, is a Dutch hardstyle DJ and record producer.  Having previously released hardstyle records under the alias 'Seizure', Joram Metekohy had his first solo release as Wildstylez in 2007 on the Scantraxx sub-label Scantraxx Reloaded.  In 2010 he started the record label 'Digital:Age' in collaboration with Noisecontrollers.  After he stopped releasing on 'Digital:Age', and its subsequent collapse, Wildstylez had a string of releases on Q-Dance Records and also released many tracks for free via social media.  In 2013, Wildstylez founded his own Hardstyle label, 'Lose Control Music', under the parent label 'Be Yourself Music'.  As of 2014, he and Max Enforcer now release their own music through 'Lose Control Music'. American singer Ciara has released six studio albums, one extended play, one DVD, one promotional single, twenty-seven singles, including seven as a featured artist, and twenty-eight music videos, including seven as a featured artist.  She made her debut in 2004 with her debut album "Goodies" which debuted at three in the US and charted within the top forty in several international markets.  The album's title track peaked at number-one in the United States for seven weeks and gave the singer the title of "The First Lady of Crunk&B," while singles "1, 2 Step" and "Oh" reached the top three in the US.  All three singles reached the top ten in many international markets, with "Goodies" topping charts in the UK.  "Goodies" was certified triple-Platinum in the United States, Platinum in Canada, and sold over five million copies worldwide.  Ciara also participated in a number of successful collaborations, including US top five hits "Lose Control" with Missy Elliott, and "Like You" with rapper Bow Wow, as well as the US top ten "So What" with group Field Mob. Zhang Yixing () (born (1991--) 07, 1991 ), better known by his stage name Lay (Korean: 레이 ), is a Chinese singer, songwriter, record producer, dancer, actor, model, author and voice actor.  He is a member and main dancer of the South Korean-Chinese boy group Exo and its sub-unit Exo-M.  He was first known after participating in the Chinese TV talent show "Star Academy" in 2005. Sheep (Chinese: 羊) is the second extended play by Chinese singer and actor Lay (Zhang Yixing), a member of the South Korean boy group EXO.  It will be released on October 7, 2017 by S.M. Entertainment.  The EP features ten tracks in total, including the single "I Need U", released on September 25. Lose Control is the solo debut extended play by Chinese singer and actor Lay (Zhang Yixing), a member of the South Korean boy group EXO.  It was released on October 28, 2016 in South Korea and China by S.M. Entertainment and distributed by KT Music.  The EP features six tracks in total, including the two singles "what U need?"  and "Lose Control". "I Need U" (Chinese: 需要你) is a single recorded by Chinese singer Lay (Zhang Yixing) for his second solo album "Sheep", which will be released on October 7, 2017.  It was pre-released on September 25, 2017, by S.M. Entertainment and dedicated to Lay's grandparents' 50th wedding anniversary. Garrett Charles Nash (born June 16, 1993) better known by his stage name gnash, is an American singer, songwriter, rapper, DJ and record producer.  He released his debut extended play (EP), "u", in March 2015 on SoundCloud and followed up with the "me" EP in December 2015.  His third EP, titled "us", was released in March 2016 and includes the single, "i hate u, i love u", featuring Olivia O'Brien, which has peaked at number 10 on the "Billboard" Hot 100 and reached number one in Australia.
Answer: Lay