If you're like any of the millions of Americans bopping to "Call Me Maybe" on the regular, chances are you've got Canadian popstar Carly Rae Jepsen on the brain.

On Wednesday, the Pop-Tarts Crazy Good Summer Concert series announced a surprise pop-up concert at Chicago's Charter One Pavilion at Northerly Island July 19 that features the catchy songstress, as well as performances from Boys Like Girls and Austin Mahone.

For 4,000 lucky Chicago music-lovers, concert tickets will be as free as watching Jepsen's video on YouTube. Fans need only RSVP to the event to get two free, printable passes, awarded on a first-come, first-served basis.

More information is available on the Pop-Tarts Facebook page. (But by the time you're finished reading it, they may already be gone, so act fast!)

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