Story highlights The 13-year-old actress has been showing off her singing voice

Her hit series returns in October

(CNN) There are "Stranger Things" than celebs showing off their pipes, but that doesn't make it any less delightful.

One of the stars of that hit show, Millie Bobby Brown, is traveling internationally to promote the series and singing some tunes along the way.

After impressing attendees with her cover of Katy Perry's "Firework" (with just a touch of Beyonce's version of "Ave Maria") at Argentina Comic Con, she had something different for her fans in Chile.

The 13-year-old actress performed a rendition of "And I Am Telling You I'm Not Going," made famous by Jennifer Holliday in the hit 1981 Broadway musical "Dreamgirls."

You're some of the best fans I'll ever know! But unfortunately I have to go! It's been such an honor to meet you!! I love you Chile 🇨🇱 💘 A post shared by Millie Bobby Brown (@milliebobbybrown) on May 28, 2017 at 3:17pm PDT

Of course, Brown wasn't even born then, but her Netflix series is set in the 1980s, so it makes sense that she would have an affinity for that decade.

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