Eminem may have been one of the headline acts at Firefly Music Festival in Dover, Delaware over the weekend, but the rapper’s American Sign Language (ASL) interpreter ended up stealing the show.

The 45-year-old took the stage to belt out “Rap God”, but it didn’t take long for all eyes to be on Holly Maniatty, who was doing sign language along to the incredibly fast lyrics by the side of the stage.

Gig-goer Kate Starr Fillingame was quick to upload a clip to Facebook, before Maniatty’s moves got everybody talking on social media.

This certainly isn’t Maniatty’s first brush with fame, with her also working for the likes of Snoop Dogg, Jay-Z, Wu-Tang Clan and the Beastie Boys.

In an interview with CBC, she previously said that there’s an awful lot of work that goes into preparing for her performances, especially hip hop shows.

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Maniatty explained, “For example, when I was getting ready for the Wu-Tang show, they talk about riots in the street. And at that time, the Ferguson riots were just kind of finishing up so of course your mind would jump there because that’s a current event but you kind of have to take a moment.”

“Go see when that song was written and see that they’re probably talking about the L.A. riots. And then think about something that’s more iconic about the L.A. riots in terms of visual accessibility and kind of build your interpretation that way to make it as as authentic and close to the meaning of the person who wrote it. You just want to make sure that you’re providing the most authentic interpretation you can.”

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Eminem’s Firefly performance also saw him issue a warning to fans following controversy over his “gunshot”-like sound effects at the Bonnaroo Music Arts Festival.

“If you are easily frightened by loud noises or offended by explicit lyrics you shouldn’t be here,” the musician said on Saturday, according to Billboard.