Kristian Konstantinov Kostov (Bulgarian: Кристиан Константинов Костов, born 15 March 2000 in Moscow) is a Bulgarian-Russian singer. He was a finalist in season one of the 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 2nd place. His song "Beautiful Mess" became very popular in not only Bulgaria but in many other countries as well.