MattyB is a 14-year-old rapper who got people on Twitter telling their girlfriends to stay safe indoors.
Also known as Mathew Morris, the tweenage rapper has a huge social media following and over a billion views, making almost every move an instant meme.
On Saturday, the mini, early era Justin Bieber issued a warning to his followers to keep their girlfriends safe indoors.
Boyfriends were worried. Even television's Cole Sprouse was afraid.