Kim Ki-bum, better known by his stage name Key, is a South Korean singer and television personality. Born and raised in Daegu, South Korea, he later moved to Seoul after a successful audition at the SM National Tour Audition Casting. In May 2008, Key debuted as a member of South Korean boy group Shinee, who later went on to become one of the best-selling artists in South Korea. Key is widely recognized as a singer and dancer, but he has also ventured into different careers, notably as a television presenter.

Toheart was a South Korean duo formed by Woohyun from Infinite and Key from Shinee in 2014. It was a collaboration between SM Entertainment and Woollim Entertainment.