Millie Bobby Brown Did an Amazing Katy Perry Impression at This Comic-Con Event

*She's* a firework.

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Millie Bobby Brown isn't just an incredible actress. It turns out she's also an incredible singer. The young Stranger Things star wowed fans at Argentina Comic Con in Buenos Aires on Friday when she belted out a verse of "Ave Maria" and then followed it up with a cover of Katy Perry's "Firework." Watch for yourself:

The crowd in Argentina was beyond excited just to see Brown, let alone to hear her show off her hidden talent.

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The 13-year-old actress showed that the feeling is mutual with a special message to her Argentinian fans on Instagram. The message, which she wrote in Spanish, translates to, "Argentina What can I say? You are so beautiful and passionate fans and I have had the privilege meeting guys! I love you to the moon and beyond! Next Chile."

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