Ylvis Performs “What Does the Fox Say” with Jimmy Fallon

Forget Miley Cyrus’ “We Can’t Stop,” Katy Perry’s “Roar,” Lady Gaga’s “Applause,” and Daft Punk’s “Get Lucky,” the most addictive song of the summer was Ylvis’ “What Does the Fox Say.” Ylvis made their late-night American television debut on Late Night with Jimmy Fallon with a live performance of the song that went viral this summer. Even Jimmy Fallon and The Roots put on fox ears and joined in for the fun.