What is musical.ly
Musical.ly was a popular social media app where users could create short creative videos. The most popular type of videos was lip-syncing on music(usually high pitched fast sounds) followed by dance, comedy, artsy stuff, etc. The platform had a lot of talented users that would follow the trends or create their own content.
In late 2017 the app was bought by the company “ByteDance” and transformed into TikTok.