And yes, it makes zero sense — but it's also weirdly mesmerising to see the instant makeovers. While most transformations are simple makeovers, some teens have gotten as creative as possible, with some transformations involving fancy dress.
In one, a teenager even transitions into a little girl after flicking her wrist.
The clips are produced on Chinese video app Dou Yin, an advanced version of Musical.ly, which lets users film short, 15-second music videos over popular songs.
The latest transformation trend follows the "Don't Judge Me" challenge from several years ago, in which people made themselves look as unattractive as possible before revealing a makeover.