The video, uploaded by Hawaii-based Bella Poarch, 19, shows her lip-syncing to the track "M to the B," a track by Blackpool's MC Millie B. It is TikTok's most popular video on the entire platform, with 33.4 million likes and over one million comments. The song was created as a "diss track" in response to MC Soph Aspin, after both girls formed part of Blackpool's grime music scene, under the banner BG Media. Grime music in the resort rose to prominence in 2016, when a documentary was made about the emerging genre. A follow-up documentary was released a year later, focusing on grievances - or "beef-" between MC Soph Aspin and MC Millie B. The "M to the B" lip-sync was uploaded in mid-August, and went viral shortly after.