
B-Brave were a boy band from the Netherlands founded in 2013. It consisted of Kaj van der Voort, Samuel Leijten, Cassius Verbond, Dioni Gomez-Jurado, and Jai Wowor. B-Brave placed third in the fifth series of the Dutch version of the X Factor.

Eden Pessia Ben Zaken is an Israeli singer, who gained recognition following her participation in the first season of the TV show X Factor Israel, in which she placed second. She has been awarded Israel’s woman of the year 3 times in a row.

Hovig Demirjian, also known by the mononym Hovig, is a Cypriot singer. He represented Cyprus in the Eurovision Song Contest 2017 with the song "Gravity", finishing in 21st place.

Tom Dice is a Belgian singer-songwriter. He finished runner-up in the Flemish version of The X Factor in 2008 using his birth name Tom Eeckhout, but soon after changed his name taking the stage name Tom Dice.

Eleftheria Eleftheriou is a Greek-Cypriot singer, musician, and actress. She came to prominence through her participation in the second season of the Greek version of The X Factor. Shortly after her elimination, Sony Music Greece signed her and submitted her as a candidate to represent Greece in the Eurovision Song Contest 2010. She was later disqualified from the national final, following the leak of her song onto the internet by an unknown party.

Ivi Adamou is a Greek-Cypriot singer. She was born and raised in Agia Napa, Cyprus and currently resides in Alexandroupoli, Greece. Adamou rose to recognition in Greece and Cyprus following her participation in the second season of the Greek version of The X Factor, where she was under the mentorship of Giorgos Theofanous. Right after her elimination from the X Factor, Adamou secured a recording contract with Sony Music Greece. She gained further recognition from her participation in the Eurovision Song Contest 2012, where she represented Cyprus with the song "La La Love".

Gevorg Harutyunyan is an Armenian artist, singer-songwriter and dancer. He represented Armenia in the 2018 New Wave Contest in Sochi, Russia. In 2014, Harutyunyan won the fourth season of Parahandes.

Highway is a Montenegrin band. They participated in the second series of X Factor Adria in 2015, and ended in fourth place. The band consists of lead singer Petar Tošić, guitarists and back-up singers Marko Pešić and Luka Vojvodić.

Daniel Kajmakoski is a Macedonian singer-songwriter, recording artist and ex construction worker. He is best known for having won the first series of X Factor Adria. He represented Macedonia in the Eurovision Song Contest 2015 in Vienna, Austria with the song "Autumn Leaves" after winning the Skopje Festival 2014.

Slavko Kalezić is a Montenegrin actor, singer and songwriter. He took part in X Factor Adria but failed to make it to the live shows. He represented Montenegro in the Eurovision Song Contest 2017 with the song "Space". In 2017, he took part in the fourteenth series of The X Factor UK, where he was eliminated from the competition at judges' houses.

Vladislav Kurasov is a singer, songwriter, the finalist of the Ukrainian version of the television show The X-Factor, the winner of the television show Star Ring, The People's Voice Winner at the 2013 International Songwriting Competition, winner of the 2014 Unsigned Only Music Competition Fandemonium. He became a semifinalist in the Ukrainian National Selection for Eurovision Song Contest 2016, with "I'm Insane"

Małgorzata Uściłowska, better known by her stage name Lanberry, is a Polish singer and songwriter. She made her debut in 2015 with the release of her debut single "Podpalimy świat", which became certified gold in Poland. Her debut self-titled album was later released in 2016.

Damien Lauretta is a French actor and singer. He is well known for portraying Clement Galan on the Disney Channel Original Latin American series Violetta.

Eugene Litvinkovich is a singer born in Belarus and popular in Ukraine, author and performer. The finalist of "Ukraine's Got Talent 4" show in 2013 and super-finalist of "X-factor (Ukraine) 3" show at the beginning of 2013

Leire Martínez Ochoa, is a Spanish singer, songwriter and the current lead vocalist of the band La Oreja de Van Gogh after Amaia Montero's departure in 2007.

Udo Mechels, born in Brussels on 10 May 1976, is a Belgian singer commonly known simply as Udo. He won the first season of the Belgian version of The X Factor in 2005.

Mrs. Greenbird is a German folk duo consisting of Sarah Nücken and Steffen Brückner. They are best known for winning season three of the German version of The X Factor.

Atle Pettersen is a Norwegian singer and songwriter from Skien and lead singer of the band The Scheen.

Steven Andrew "Stevi" Ritchie is an English singer and reality television star, known for his appearances on The X Factor and Celebrity Big Brother.

Yuliya Olegovna Samoylova, sometimes credited as Yulia Samoilova or Julia Samoylova, is a Russian singer-songwriter. In early 2017, she was selected to represent Russia in the 2017 edition of the Eurovision Song Contest with the song "Flame Is Burning", but was subsequently banned from the contest's host country, Ukraine, due to violating Ukrainian law by entering Crimea through Russia in 2015, shortly after the region was annexed by Russia. In response to the ban, Russia ultimately withdrew from the contest. The following year, Samoylova was instead chosen to represent her country in the 2018 edition of the contest in Portugal. Performing "I Won't Break", she placed 15th out of 18 contestants in the second semi-final, failing to qualify for the grand final. "I Won't Break" was the first representation of Russia to not reach the final since the introduction of semi-finals in 2004.

Marta Markiewicz, better known as Sarsa or Sarsa Markiewicz, is a Polish singer, songwriter, and record producer. She first achieved mainstream attention due to her 2015 single "Naucz mnie", which occupied the number-one position on the Polish singles chart for six consecutive weeks, and was certified diamond by the Polish Society of the Phonographic Industry (ZPAV). Her debut studio album Zapomnij mi was released on 28 August 2015.

Rasmus Thude is a Danish singer and songwriter with more than 20 mio. plays worldwide. He has previously participated in the Danish X Factor in 2010. In January 2011 his song LLL got him worldwide attention when it was mistaken with the American singer, Justin Timberlake. The song had been renamed "Take You Down" and both media and fans thought it was a new single from JT. In 2014 Rasmus Thude enrolled at DTU studying Processing and Innovation. In 2015 he created his first app start-up "Ta' det", where he is currently working as CEO.
Kati Wolf is a Hungarian singer. Wolf represented Hungary at the Eurovision Song Contest 2011 with the song "What About My Dreams?".