Eurovision Blues for UK
The four-piece will perform the self-written song I Can at the annual competition, which will take place in May in Dusseldorf, Germany.
It is the first-time since 1997 that the UK has opted for an established act to represent the country at the event. On that occasion Katrina and The Waves triumphed with Love Shine a Light.
Formed in 2000, Blue had a two-year hiatus before reforming in 2009. Over their decade long-career, the band has sold more than 13 million records, and won two Brit Awards.