Monika Avsenik is a Slovenian singer of pop and folk music. She is the granddaughter of legendary musician Slavko Avsenik and the sister of Sašo Avsenik. Her musical career began in 2015 at the Avsenik Festival. She performs as a soloist, a member of Perpetuum Jazzile, and a backing vocalist for Jan Plestenjak and Gregor Ravnik. In 2024, she left her job as a primary school teacher to focus on music. One of her notable performances includes a duet with Andrea Bocelli in the Pula Arena.

Perpetuum Jazzile is known as one of the most popular European vocal groups, specializing in attractive rhythmic music using voices only, garnering well over 70 million views on YouTube by January 2019. Unique song renditions of this critically-acclaimed vocal orchestra from Slovenia are known for their powerful rhythms, rich harmonies, spiced up by the vibrant singers' energy. In 2017 Perpetuum Jazzile has also been proud to enter the race for Grammy nominations in four categories. In the recent years, the group has rocked the concert halls of North and South America, Asia, and all across Europe, while it has also been proud to enrich many events of the most demanding corporate clients, such as Disney Europe, Pirelli Calendar, Renault, and others.

Samo Vovk is active as a musician, singer, arranger, producer, guitarist, and pianist. He started to practice singing more seriously during his student years, when he entered the world of a cappella music through the Perpetuum Jazzile choir. He also began to teach himself music arrangement and jazz harmony. He is currently the artistic leader and arranger for the Vokalni band Kreativo a cappella ensemble. As an arranger and composer, he previously also collaborated with other a cappella groups and choirs both at home and abroad. Since 2012, he plays guitar in a duo with his wife, violist Barbara Grahor Vovk.

Sandra Feketija is a Slovenian singer, best known as an outstanding backing vocalist. She performed as a backing vocalist at the Eurovision Song Contest four times: for Rebeka Dremelj (2008), Quartissimo (2009), Maja Keuc (2011), and Eva Boto (2012). She was also an alto, soloist, and vocal coach with the group Perpetuum Jazzile. Feketija has collaborated with many Slovenian artists, including Uroš Perić, Oto Pestner, Nuša Derenda, Rebeka Dremelj, Tabu, and Nuška Drašček. In addition to her music career, she is a teacher of English and German and runs a language studio in Celje.