Cho Hyung Woo (조형우) is a South Korean singer-songwriter under APOP Entertainment. He appeared on the first season of MBC's Star Audition: The Great Birth in 2011 before releasing a duet album with Gain in 2013. He then released his first solo mini album, Him, on October 17, 2014.
- "Pride and Prejudice OST Part.2" (with Park Ji Yoon) (2014)
- "Shopping King Louie OST Part.8" (with Jane Jang) (2016)
- "Welcome to Waikiki OST Part.2" (2018)
- "Pure Love Of The Great Birth - Yellow Green" (with Kim Hye Ri) (2011)