Sergej Božić, known mononymously as Sergej, is a Croatian singer from Rijeka known to the public as a contestant on the fourth season of The Voice Croatia, where he was eliminated in the semi-finals. Released in October 2024, his first single was "Neke duše" (Some Souls), followed by the release of "Blef" (Bluff) in April 2025. Before his first official single, he recorded a duet, "Dan po dan" (Day By Day), with Vanna, his mentor on The Voice, released in July 2024.