Kang Seung-yoon
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Kang Seung-yoon (born ()January 21, 1994), known as Seungyoon or Yoon, 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 August 2014.

Kang Seung-yoon was born in Busan, South Korea, on January 21, 1994. Among his family, he is an only child raised solely by his single mother. Kang learned to play the guitar in the eighth grade. While in his last year of junior high, he took lessons in both classic guitar and billiards, soon going on to become the regional representative for billiards.

In 2010, Seungyoon was a contestant on Mnet's singing contest Superstar K2. He finished in fourth place, having released two singles, "I'll Write You a Letter" and "Instinctively". "I'll Write You a Letter" peaked at number 24 on the Gaon Chart after its release on the Superstar K2: Top 6 (My Story) album, while "Instinctively" became a number one hit single in South Korea and was listed as one of the top 100 songs of the year. It was released on its own as a digital single later in the Superstar K2 compilation album, Superstar K2 Up to 11. He also released "Life is Tab" alongside three other contestants to promote the Samsung Galaxy Tab.