What is the 2-4-2 makeup rule that's going viral on social media?

TikTok users swear by the 4-2-4 method for naturally radiant makeup in record time. Photo: AFP

How would you like to get a few minutes' extra sleep, without having to neglect your makeup routine, and still achieve a naturally radiant complexion?

That's the promise of the 2-4-2 method, which is going viral on TikTok.