Which singer is also a guitarist, Kang Seung-yoon or Piotr Wiwczarek?
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.
Jung Seung-hwan (singer) Jung Seung-hwan (; born 21 August 1996) is a South Korean singer. He is known as the runner-up of SBS's "K-pop Star Season 4". His rendition of Kim Jo Han's song "I Want to Fall in Love" peaked at number 1 on Gaon Digital Chart in 2014. His other rendition of Lee Hyun Woo's song "I Have To Forget You" with another K-Pop star contestant, Park Yoon Ha, also peaked at number 1 on Gaon Digital Chart. He is currently signed to Antenna Music and released his debut album "His Voice" in November 2016.