The group will release its digital debut single “Happiness” to music websites, SM Entertainment said, releasing its teaser video clips through redvelvet.smtown.com and youtube.com/smtown.
"Red Velvet" is composed of four members – Seul Ki, Irin, Wendy and Joy. Seul Ki, Irin and Wendy are known for pre-debut activities they did under the name of “SM Rookies.”
SM Entertainment manages several top K-pop musicians, including EXO, TVXQ and Girls' Generation.