Hong Sung-mi (Hangul: 홍성미, Hanja: 洪性美, born 17 July 1986), commonly known by her stage name Dana, is a South Korean singer, musical actress and vocal coach. Although she was originally a solo singer, which debuting in 2001 and later debuted as a member of South Korean girl groupThe Grace in 2005.
In 2001 she released her fairly successful debut single "Sesang kkeut kkaji" (Until The End of The World), an adapted song of "Tell Me No More Lies" composed by European songwriter Stefan Aberg. She followed up with "Diamond", a pop/dance track featuring Jung Yunho (U-Know, who eventually became a member of TVXQ in 2003).
Her career blossomed and continued with promotion by appearing on variety shows such as X-Man, as well as playing a main role in the sitcom Nonstop. Her second album "Maybe" was released in 2003, however, sold poorly. From that point on, she disappeared from the music industry (aside from SMTOWN collaborations) until the debut of The Grace
Dana redebuted as a member of South Korea girl group The Grace in 2005. The group debuted on April 29, 2005 in China and May 1, 2005 in South Korea. For the group's fourth Japanese single, she composed the musicto her own solo song "Sayonara No Mukou Ni".As of 2010, the group was indefinite hiatus.
Starting in May 2010, Dana started her musical acting career with played role on Daejanggeum Season Three. Later the same year, she starred in Rock of Ages as Sherrie.
In late 2010 and early 2011, she starred as Constance in The Three Musketeers. She commented in an interview about being nervous about having to kiss Super Junior Kyuhyun.
In June 2011, after an image leaked of SM Entertainments itinerary for 2011 showing a release a new single by CSJH, SM confirmed later that CSJH would be making a comeback with a new image. On 8 July 2011, CSJH's Dana & Sunday made a comeback as a sub-unit with a digital single titled 'One More Chance', the single was released on 11 July.
From March 2012 to June 2012, she was cast as Brenda Strong for the re-run of the musical Catch Me If You Can. In September 2013, she starred as Bonnie for the musical Bonnie and Clyde. In February 2014, she returned to cast as Constance in The Three Musketeers. In early 2015, she was cast as Joy for the musical Robin Hood.
After 13-years, Dana returned as soloist with release "Touch You" on May 20, 2016 for S.M Entertainment project "SM Station". She starred to promotion this song on The Show on May 24.
On May 4, 2016, during MBC's Radio Star, Dana revealed that she had been in a relationship for three years. It was later revealed that Dana's boyfriend is Lee Ho-jae, who is a film/music video director.