National Symphony Orchestra performs ‘Baby Shark’ at the John F. Kennedy Center for the Performing Arts

It’s become the Washington Nationals’ unofficial anthem heading into the World Series and it’s popularity is growing, even in the classiest of places.

We’re talking, of course, about “Baby Shark,” as Nationals fans sing the children’s tune throughout the streets of the nation’s capital.

On Sunday, visitors at the John F. Kennedy Center for the Performing Arts were treated to a special performance of the tune by the National Symphony Orchestra.

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Dressed in shark outfits and Nationals baseball caps, the French Horn Section went into the lobby to perform “Baby Shark” for the children waiting in between Halloween concerts.

Shark Mania began back in June, when Nats outfielder Gerardo Parra stunned fans by choosing the children’s viral hit “Baby Shark” as his official walk-up song.

The selection was a tribute to his 2-year-old daughter – and a turning point in a season that had been dismal.

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Now, fans can’t get enough of it, and neither can Parra’s teammates.

Many fans at Nationals Park will tell you, the Baby Shark song is their secret to postseason glory.

A blue and white shark frequently graces the Nationals dugout, including during the National League Championship Series when Washington swept the St. Louis Cardinals.

You can watch all the 2019 World Series action on FOX beginning on Tuesday, October 22.