The purpose of this instrumental case study was to understand how learning to play the ukulele influenced the music identity of elementary education majors. Eighteen participants (17 females, 1 male) from two universities created YouTube playlists and recorded solo ukulele performances for their YouTube channel. Music identity perceptions were collected via writing reflections, video recorded class sessions, and focus group interviews. We found that students' early life experiences informed their beginning-of-semester perceptions of music identity (past selves), while in-class experiences contributed to higher levels of music competence and participation, and meaningful shifts in music identity (present and future selves). Music teachers should consider how the ukulele and YouTube may be used to promote individual expression, accountability, and self-directed learning. We encourage music teacher educators to use music biographies and YouTube as tools for culturally responsive teaching while creating safe spaces for the music identity development of less experienced/confident musicians.