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
Atomic Bomb exploding gif
Tear The House Up (Official Music Video) - Hervé x Zebra Katz - YouTube
Bieber is my copilot. Thank you, President Bush. ~Dave Grohl
Debbie Downer SNL gif