Which singer is also a guitarist, Kang Seung-yoon or Piotr Wiwczarek?
Piotr Wiwczarek Piotr Wiwczarek (born 22 October 1965 in Olsztyn, Poland), also known as Peter, (ex nickname Behemoth) is a Polish guitarist and vocalist who is the frontman for the death metal band Vader, as the only constant member of the band since its inception. He has also collaborated with Kazimierz "Para" Paraszczuk on his tribute album, Bandid Rockin', and is the producer of several of Vader's releases. He is also the founder and guitarist of a side-project, named Panzer X.
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.