Kristian Konstantinov Kostov (Bulgarian: Кристиан Константинов Костов; born 15 March 2000) is a Bulgarian-Russian singer.

He was part of the first season of the kids version of the show where his mentor was Dima Bilan, who chose Kostov to advance to the finals.

[10] After his success in Russia, Kristian auditioned for the fourth season of X Factor Bulgaria as he is of Bulgarian origin.

[13] On 7 October 2016, his debut single "Ne si za men" was released by Virginia Records.

On 11 January 2019, Kostov was revealed as the last of the seven first-round performers competing on the seventh season of China's long-running singing competition, Singer, whose cast consisted of veteran Chinese singers Liu Huan, Chyi Yu, Yang Kun, Wu Tsing-fong, Zhang Xin, and Escape Plan.