Choi Dong-wook (; born November 9, 1984), better known by his stage name Seven (; stylized as Se7en), is a South Korean singer, who has also advanced into Japan, China and the United States. Career 2003–2004: Debut with Just Listen, best new artist awards, and Must Listen Seven began training under the management agency YG Entertainment at the age of fifteen. After four years of training in singing and dancing, he made his debut in 2003 with the album Just Listen, released on March 8. Later that year, he received best new artist awards at the Golden Disc Awards, MBC Gayo Daejejeon, Mnet Music Video Festival, SBS Gayo Daejeon, and Seoul Music Awards. On July 7, 2004, Seven released his second album, Must Listen, which he described as being more grown-up than his debut album. Must Listen peaked at number one on the monthly Recording Industry Association of Korea album chart. The album's lead single, "Passion", won Best Male Video at the Mnet Km Music Video Festival, as well as bonsang awards at the Golden Disc Awards and MBC Gayo Daejejeon. 2005–2006: Expansion in Asia, 24/Se7en and Se7olution In April 2005, Seven continued promotions for Must Listen in Thailand, where the album sold over 100,000 copies and the singles "Passion" and "Tattoo" topped the Channel V weekly charts. Later that month, he won the award for Popular Asian Artist at the Channel V Thailand Music Video Awards. On January 9, 2006, Seven released his first Chinese album, Must Listen (不得不聽), in China, Hong Kong, Taiwan, Malaysia and Singapore. The album includes all of the songs from his 2004 Korean album of the same name, as well as two new songs in Chinese. He went on to win three awards at the China Original Music Pop Chart Awards held that summer, helping to establish his reputation as a "Hallyu star". On March 8, Seven released his third Korean studio album, 24/Se7en (which includes the lead single "I Know"), as well as his first Japanese studio album, First Se7en. 24/Se7en charted at number one on Hanteo's daily album chart in South Korea, while First Se7en debuted at number eight on Oricon's daily album chart in Japan. He released his fourth Korean studio album, Se7olution, on November 1. 2007–2010: Acting debut and U.S. promotions Seven made his acting debut in January 2007 as the lead of the TV drama Prince Hours, a spin-off