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
Pop Danthology 2014 - He's still the best mixologist on the planet!
Bridgit Mendler Ready or Not Hurricane gif
Guy plays Jason Mraz I'm Yours on Two Nokia Phones -- and American Idol 2015 Adam Ezegelian audition with the same song
Jill Bolte Taylor Ode to the Brain - Symphony of Science