"Last One" (ที่หนึ่งในใจของเธอ; stylized as Last ONE) is a digital single by the contestants of LAZ iCON. It was released on November 9, 2021.
Release
The single was unveiled for the first time on episode 6 of LAZ iCON. On October 11, 2021, the official lyric video was released through YouTube, with it being available on streaming sites starting from November 9.