Kim Woo-sung, also known as Woosung and Sammy, is a Korean-American musician, singer, songwriter, rapper and composer, who rose to prominence when he became the main vocalist and guitarist of the Korean band called The Rose under the record label J&Star Company. His group started as an indie band busking on the streets of Seoul, but eventually joined the mainstream market with their single entitled "Sorry" in 2017. He participated in the reality-television band survival series "Super Band," aired in JTBC in 2019, and finished in fourth place during the final round. He later debuted as a solo artist, and released his first extended play (EP) called "Wolf" in 2019.