Bulgaria participated in the Eurovision Song Contest 2017 with the song "Beautiful Mess" written by Borislav Milanov, Sebastian Arman, Joacim Bo Persson, Alex Omar and Alexander V. Blay. The song was performed by Kristian Kostov. On 13 March 2017, the Bulgarian broadcaster Bulgarian National Television (BNT) announced that Kristian Kostov had been selected to compete at the 2017 contest in Kyiv, Ukraine. The song that Kostov competed with, "Beautiful Mess", was also internally selected and was presented to the public on the same day.

Kristian Konstantinov Kostov is a Bulgarian-Russian singer. He was a finalist in season one of The Voice Kids Russia and a runner-up in the fourth season of X Factor Bulgaria. He represented Bulgaria in the Eurovision Song Contest 2017 with the song "Beautiful Mess", finishing in second place. In January 2018, Kostov won the EBBA Public Choice award. In January 2019, he was one of seven singers who performed in the seventh season of Singer.