This article focuses on the musical aspect of the TikTok application. The aim of the study is to identify elements of a musical piece and other factors that may influence the popularity of a song published on this platform. The main research method is the analysis of the content of songs that have gone viral on TikTok. In addition, existing sources related to the subject of the study were analysed. The results of the research show that the elements that can contribute to a piece of music “breaking out” on TikTok include: lyrics that address typical human problems, a fast tempo, and simple and effective choreography created for the song. The resonance of the song with pop culture and the activity of influencers also play a significant role in its promotion.