Here at Allure, we often write about beauty trends started by celebrities. And so many things can fall under the oversized beach umbrella that is "beauty" — if it's a thing that someone is doing to their body, it probably counts. On the face? Definitely qualifies. In the face? Sure! And it seems Machine Gun Kelly might have just kicked off a new trend at the 2021 Billboard Music Awards: a seemingly dyed-black tongue.