“Your Life Is A Lie,” one of the singles from MGMT’s new self-titled album, uses a ton of cowbell, and the band used an obnoxiously huge one when they played Letterman a few months ago. And now, with the band heading out on tour, they’re asking fans to take over cowbell duties on the song. So when MGMT are in your city (if you live in Detroit, Louisville, Charlotte, Durham, Richmond, Philadelphia, Pittsburgh, Wallingford, Atlanta, or Washington DC), you could be the one holding down cowbell duties. Below, check out the video that details the Instagram-based contest, as well as the video of that Letterman appearance.

MGMT is out now on Columbia.

Incidentally, we’ve got some tickets to give away to MGMT’s Brooklyn show with Dinosaur Jr. Retweet this to enter.