Jo Dong-rim, better known by the stage name Mad Clown, is a South Korean rapper, songwriter, and record producer. He debuted with the single "Luv Sickness" in 2008 and released his first extended play, Anything Goes, in 2011. He broke into the mainstream following the release of "Stupid in Love," his hit 2013 collaboration with Soyou of the girl group Sistar. He has since released the extended plays Ferocity (2014), Piece of Mine (2015), Love is a Dog From Hell (2017), and 0 (2020).

Kang Ji-hyun, known professionally as Soyou, is a South Korean singer. She is best known as a former member of the South Korean girl group Sistar.