Cho Joong-hoon, better known by his stage name Cho PD, is a South Korean record producer, rapper, and the founder of record label Stardom Entertainment. Producing his own music for himself and his crew Stardom, he rose to prominence through the internet then debuted in 1998. Later, he also would support other artists like Psy, Verbal Jint and a young Dok2 earlier in their careers. After twelve years, he briefly "retired" from music in 2010. However, he came out of retirement in 2011 with his two studio albums, State of the Art and Art of Business.

Park Jae-sang, known professionally as Psy, is a South Korean rapper and singer-songwriter. Known for his humorous music videos and performances, he has received numerous accolades, including an American Music Award, ten MAMA Awards, and a World Music Award.