Popsugar Entertainment Millie Bobby Brown Millie Bobby Brown Singing on Stage With Maroon 5 Millie Bobby Brown, Coolest Person Alive, Just Rapped on Stage With Maroon 5 24 September 2018 by Tori Crowther View On One Page Photo 7 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Previous Next Start Slideshow Millie Bobby BrownMaroon 5