Lead vocalist and principal dancer for the South Korean hip hop group Monsta X that was formed by Starship Entertainment. They released EPs titled Trespass and Rush, and have been featured on several TV shows, radio programs and in various other group's music videos.
He was previously an apprentice at JYP Entertainment and was possibly going to be part of the group Got7. He was one of seven contestants who came out on top of a show called No Mercy to earn a spot in the group Monsta X.
He appeared on the soundtrack of Protect the Boss. He and Monsta X's accolades include: a Golden Disk Award for Next Generation Artist, a Mnet Asian Music Award for Next Generation Asian Artist and a Seoul Music Award for Male Dance Performance, among others.
His real name is Son Hyun Woo and his Chinese name is Xin Xiu.
He and Monsta X band mate Wonho both appeared in the SISTAR music video of their song "Talk to My Face."