Nikita Green Tretyak (born March 29, 2001 in Lviv, Ukraine), better known by his stage name Xlson137, is an music performer and blogger. He began his creative career as a main member of the Xlson's Production, a loose collective of independent people including Vladimir Tsaturov, Artem Zacepin, and Anton Kazmin. He released his solo debut album 'Underground' in 2016 and has since released 2 more albums, his latest being Days After Sunset..., released in 2017. His new singles appear more often than full-length compilations.

Born in Lviv, Ukraine (Lviv region), Nikita often traveled as a child, moved from city to city, among which were Ilpendam and Yalta. At the age of seven, he went to the 13th Secondary School in Lviv, where he graduated from grade 2 and dropped out in 2007. This was due to frequent family relocations and at about the same time, he entered another School 15th in Moscow. Since he did not have any entertainment there, Nikita began to get involved in music and dancing. In his free time after classes, he began to devote to his work. At about age 12, he met with Artem and Vladimir, and already in 2010 they together founded a mini club called "Xlson's Production". By the time he was 13 years old, he was the model leader of the created band. Finally, in 2013, Nikita decides to expand the audience and truly discover her talent on YouTube video hosting, then the Xlson137 channel was created. At this point, he began to publish videos on various topics, but the priority of the blog is games and music. This became such a huge project that by 2015, almost all vlogs smoothly flowed into music videos. And in 2016, everything became so serious that the author decides to try himself in this area. After some time, Nikita announced that he was leaving the 'XP' association and was completely leaving for solo work. And so it happened. The new song Underground, as well as a vivid clip from 2016, are released.

Discography
Days After Sunset... (2017)
Underground "Deluxe" (2016)
Underground (2016)
Xlson137 (2009)

Xlson137 is actively conducting his eponymous video blog on YouTube and currently has more than 6.1 thousand followers (2020).

Due to genetic characteristics and early migrations, Xlson137 belongs to the Caucasoids and also has Dutch roots.

In January 2018, Xlson137 announced that he would work on the last two albums of his career. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.