Arcade Fire's Win Butler Joined Future Islands In Montreal

Obviously, for "Seasons (Waiting On You)."
Future Islands

You already know that Future Islands' "Seasons (Waiting On You)" is one of the best songs of 2014, and it seems that Arcade Fire's Win Butler knows that too. At Future Islands' recent tour stop in Win's hometown of Montreal, he came out on stage to duet with Samuel T. Herring, accompanied by ecstatic crowd cheers. Try not to smile when you watch the selection of fan-shot videos, below.