I (Taeyeon song)

"I" is the debut solo single by South Korean singer Taeyeon featuring Verbal Jint. It was released by SM Entertainment on October 7, 2015, as the lead single from her debut EP of the same name. The song's instrumentation was developed from a track composed by a collaborative team of musicians, while Taeyeon and Verbal Jint penned the Korean lyrics with assistance from Mafly. "I" is a mid-tempo pop rock song driven by an electric guitar and a drum beat, with autobiographical lyrics capturing Taeyeon's reflections on her career and highlighting her hope for the future.

Commercially, the song peaked at number one on the weekly and monthly Gaon Digital Chart. By October 2018, it had sold over 2.5 million digital copies. The single earned 11 music program awards, as well as Song of the Month (October) at the Gaon Chart Music Awards and a Digital Bonsang at the 30th Golden Disc Awards. It received positive reviews from music critics in South Korea, who praised its musical styling, Taeyeon's vocal performance, and Verbal Jint's complementary rap verse.

The accompanying music video was filmed in Auckland, New Zealand. It illustrates Taeyeon's journey to find her true identity and achieve freedom, by depicting her playing two contrasting roles: a café waitress and a woman wandering through a tranquil natural landscape. Taeyeon performed "I" on various South Korean music programs, including Inkigayo, M Countdown, Music Bank, and Show! Music Core. The song has since become a staple on the setlists of her numerous concerts and tours.