Kang Seung-yoon, known mononymously as Seungyoon or Yoon or Yooyeon, is a South Korean singer-songwriter, composer, arranger, producer, actor, photographer, judge, DJ, youngest and leader of boy group Winner. In July 2021, he debuted as Photographer Korean Eye 2020 and exhibit his photos at Saatchi Gallery London. He appeared on the reality television singing contest Superstar K2 (2010), he rose to prominence after finishing in fourth place. Through the show he released the digital single "Instinctively", which became a number one hit, almost selling over 2 million copies. In January 2011, he was scouted by South Korean label YG Entertainment and officially debuted as a solo artist in July 2013 with the digital single "It Rains" and as the leader of Winner in August 2014. Seungyoon ventured into acting through the sitcom, High Kick: Revenge of the Short Legged (2011). His first lead role through the web series, We Broke Up (2015) earned him the "Best Male Actor" award by the K-web Fest Awards. Roles in tvN Prison Playbook (2017), MBC's Kairos (2020), and tvN's Voice 4 (2021) further solidified his career as an actor. He also served as the "122nd Masked King" on MBC's King of Mask Singer under the alias "Chow Yun-fat". He achieved a record-breaking six consecutive wins, earning him the titles: "The First 6-Time Idol Champion" and "The Youngest Champion".