Julian Casablancas wore Win Butler’s giant bobblehead mask during Arcade Fire’s set at Lollapalooza Argentina

Arcade Fire were joined by a very special guest during their headlining performance at Lollapalooza Argentina on Tuesday Night. As they’ve been known to do, the performance include giant papier mâché versions of the band, and who might have been wearing Win Butler’s mask? The Strokes’ own Julian Casablancas. The real Win Butler seemed relatively caught off guard by Casablancas’ trademark leather jacket, perhaps fearing the presence of another thief. “What the fuck is this?” he exclaimed before Julian revealed his true identity. The fun, albeit brief moment took place prior to the band’s opening performance of “Normal Person”. Watch the replay below (scroll to the 1:29 mark).