2009, Year of Us is the third extended play (EP) by South Korean boy group Shinee. It consists of six tracks and it incorporates alternative rock and hip-hop music genres. The digital version of the album was released on October 19, 2009, with a physical release on October 22. The title track, "Ring Ding Dong", was released on October 14, 2009, through various music sites.

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.