Millie Bobby Brown Performs Cardi B's 'Girls Like You' Verse at Maroon 5 Concert in Nashville - Watch!

Millie Bobby Brown just gave the crowd a big surprise! The 14-year-old Stranger Things star made an appearance onstage at the Maroon 5 concert on Sunday night (September 23) at the Bridgestone Arena in Nashville, Tenn. PHOTOS: Check out the latest pics of Millie Bobby Brown While on stage, Millie performed Cardi B‘s verse from