Lee Sang Woon, better known for his stage name Geegooin, is a member of the Korean hip-hop trio Rhythm Power. The trio debuted in 2010.
Geegooin has appeared in a hip-hop survival show Show Me the Money as a contestant three times. He is known for his high pitched trademark sound “Hyah!” (핳~) that he uses in his songs a lot.
Rhythm Power’s song "How Strange" was part of Prison Playbook’s OST released in 2018.