Once again, <PERSON> is one of the coolest teenagers on the red carpet. The Stranger Things actress looked absolutely stunning as she attended the MTV VMAs on Tuesday. Wearing a fashionable black jumpsuit, the 14-year-old had aa little fun with the cameras she playfully stuck her tongue out and gave a wave. <PERSON> is one of the many stars presenting during the show, and something tells us we can expect even more fun moments from her inside. She's reportedly sitting in between <PERSON> and <PERSON>. Maybe they can talk about their mutual love of Taylor Swift?