SEE ALSO: Mad Clown and SISTAR's Soyu impress with collaborative song 'Stupid In Love'

Immediately after its release on the 10th, "Stupid In Love" ranked #1 on all 9 major music charts, including MelOn, Mnet, Olleh Music and Bugs Music.

"Stupid In Love" was composed by Kim Do Hoon and written by Min Yeon Jae and Mad Clown himself. Soyu's appealing voice and Mad Clown's rap flow, which fans already know from his days on 'Show Me the Money 2', made the song come alive to express the feelings of a woman during a breakup. The song is the first of many collaboration projects to come from artists of Starship Entertainment and its independent sub label Starship-X.

Soyu and Mad Clown will perform their song for the first time on music shows this week!

Congrats, Soyu and Mad Clown!