Kim Hyung-soo (; born December 30, 1981), better known by his stage name K.Will (), is a South Korean singer. The name is a combination of the first letter 'K' of his last name 'Kim' and the English word 'Will', which means will. He debuted in 2007 and has since become known for his chart-topping ballads. He has also been dubbed the "Prince of OST" for his frequent Korean drama soundtrack appearances. K.Will has released four full-length albums: Left Heart (2007), Missing You (2009), The Third Album (2012–2013), and The Fourth Album (2017–2018). Career Pre-debut Prior to his debut, K.Will trained to be a singer for five years under producer Bang Si-hyuk. He also worked as a "guide vocal," singing demos of songs that would ultimately be recorded by other artists including TVXQ, g.o.d. and Rain. During this time, he was dubbed the "male Mariah Carey," after a video of him singing Carey's songs became popular on South Korean websites. 2007–2009: Debut and Starship Entertainment K.Will released his first album, Left Heart, on March 6, 2007 via Bang's label Big Hit Entertainment. Producer J.Y. Park composed the album's title song, which reached #3 on the Melon digital chart shortly after its release. That year, K.Will also released the hit song, "Moon Setting Alone," from the War of Money soundtrack, and was voted the best new singer of 2007 in a survey of South Korean television writers. In January 2008, K.Will left Big Hit and joined his agent Kim Shi-dae's new company Starship Entertainment. On December 2, 2008, he released his first digital single under Starship, "Love 119" (a collaboration with rapper MC Mong). The single reached #1 on various online music charts and ranked #2 on the KBS Music Bank chart without any promotions. K.Will released his first extended play, Dropping the Tears, featuring a title track of the same name, on March 31, 2009. While promoting the album, he gave voice lessons to Lee Min-ho, the lead actor in the television series Boys Over Flowers, to prepare Lee for recording the song "My Everything" for the show's soundtrack. K.Will made his acting debut in September alongside Han Hyo-joo in the web series Soul Special. On November 5, 2009, he released his second album, Missing You. The album's lead single, "Miss, Miss and Miss," was a success. However the second single, "Hypnosis" featuring rapper Outsider, was banned from airing on