Have you seen the commercial for Pokerstars.net that runs frequently on TSN and Sportsnet? The one featuring poker player Bertrand (Elky) Grospeliers, he of the dyed blond hair. There is a piece of music playing in the ad that sounds a lot, and I do mean almost exactly, like Arcade Fire's song Reflektor. It is not that song , but sounds so much alike that the Canadian band could sue if they did not give permission to the advertiser.
