2015 single by Taeyeon featuring Verbal Jint
"I" is the debut single by South Korean singer Kim Tae-yeon (better known by her mononym Taeyeon) featuring Verbal Jint, taken from Taeyeon's debut EP of the same name. The song lyrics was written by Taeyeon herself, Mafly, and Verbal Jint, while the music was composed and arranged by Myah Marie Langston, Bennett Armstrong, Justin T. Armstrong, Cosmopolitan Douglas, David Quinones, Jon Asher, and Ryan S. Jhun. It was released digitally on October 7, 2015, in conjunction with the release of the EP, and was released on Korean Broadcasting System's "K-Pop Connection" radio on October 9.
Upon its release, "I" received generally favorable reviews from music critics, who praised its musical styles and Taeyeon's vocals. The single peaked atop the South Korean Gaon Digital Chart and has since sold over 2.5 million digital copies as of October 2018. To promote the song and the EP, Taeyeon made several appearances on music programs including Inkigayo, Music Bank, and M Countdown.