JERSEY CITY, N.J. — It ain't over 'til the fat lady sings. Or in this case, Jordan Spieth and Dustin Johnson show off their pipes.

On Sunday evening, Team USA had a predictably jovial press conference following its 19-11 thumping at the 2017 Presidents Cup. But no one could have seen this coming.

RELATED: Matt Kuchar runs Team USA's hysterical pre-press conference press conference

When the question of favorite song sung by the fans at Liberty National came up, it was Jordan Spieth who first burst into a rendition of "Si-Woo shakin' that ass," a play on International Team member Si-Woo Kim and Groove Armada's 1999 track, "I see you baby (shakin' that ass)." And Spieth really got into it:

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Moments later, Dustin Johnson gave everyone in the room another (pleasant) surprise by jumping in with his own version:

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And a declaration.

"Best song, ever," the World No. 1 said. "Ever. By any side."

That's a pretty bold statement, DJ. But he seemed to be pretty serious about it. When the press conference ended, DJ momentarily climbed up on a table, sang it again, and this time, added an actual ass shake. This should be one heck of an after party. And no matter where it's held, we've got a hunch about one song Team USA will request to hear.

RELATED: What should we call the 2017 Presidents Cup? Our favorite nicknames

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