It's by Fleetwood Mac:
It's funny to watch Paul Rudd dance to this song in the 12-7-2013 episode.
Too bad that's not on YouTube,
Stashed in: Music Videos!, SNL
American Idol 2014 Fairfax VA Contestant Kelley Kime Daughter Sang Let It Go in the Audition and Earned Herself a Ticket to Hollywood
Adam Sandler and Andy Samberg SNL 40 Song That's When You Break
Radiohead - Just
Bruno Mars this here is the ice cold gif