Millie Bobby Brown is turning the entertainment game Upside Down.

The “Stranger Things” star is back at it, killing another cover from a famous musician to the delight of a live crowd. Brown, 13, treated fans at Argentina Comic Con in Buenos Aires with her take on Katy Perry’s “Firework”.

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Brown chatted about her character Eleven and the upcoming second season of the breakout Netflix show. Afterwards, she broke into impromptu performances of both “Firework” and the classic “Ave Marie”.

You’ll remember Brown first brought musicality to the mainstream with her performance of Nicki Minaj’s verse from “Monster” on “The Tonight Show Starring Jimmy Fallon”.

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The actress said she was drawn to the role of Eleven because “she is powerful, iconic, a woman and a hero.” Adding how, “I loved [the look of Eleven] and knew right away that I would love the complete look to the character.”

Season two of “Stranger Things” creeps into homes on October 31, Halloween 2017.