Joost Klein (born 1997) is a Dutch rapper, singer, and former YouTuber from Friesland, in the north of the Netherlands. He first built a following online as 'EenhoornJoost' (Unicorn Joost) before moving into music, mixing hip hop with electronic styles such as drum and bass, hardstyle, and gabber.
He broke through with tracks like 'Wachtmuziek' and the German number-one hit 'Friesenjung', but he is best known internationally for 'Europapa', the Netherlands' entry at the 2024 Eurovision Song Contest. Joost has called the song an ode to Europe and a letter to his late father, who taught him that the world has no borders. It went on to become the most-streamed competing song of that year's contest on Spotify and YouTube.