CHICAGO (CBS) — It’s not exactly the mayor in a mosh pit.

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But one concert-goer at Taste Of Chicago did capture Mayor Rahm Emanuel grooving to Robin Thicke’s “Blurred Lines.” (You know, the song with the unrated video that includes topless female models. No, that link isn’t to the video. Find that yourself. )

The mayor starts out with a little head bob but then begins to loosen up–at one point taking off his necktie and stuffing it into his pocket.

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DNAInfo’s Mark Konkol sat down recently to discuss the mayor’s love of music, which includes a requirement that his wife join him at live concerts.

“I grew up with music. I love it, and I haven’t given up my passion for it,” Emanuel told Konkol.

In his youth, the mayor was a ballet dancer, and reportedly turned down a chance to participate with the Joffrey Ballet in New York.

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We guess this video proves that.