Jimmy Fallon and Michelle Obama Reunite for 'Evolution of Mom Dancing Part 2'

Jimmy Fallon donned the mom wig once more on Thursday's Tonight Show for the "Evolution of Mom Dancing Part Two." First Lady Michelle Obama – on set promoting her Let's Move kids fitness initiative's "Gimme Five" challenge – joined the host to summarize the most awkward and hilarious maternal grooves in history. During the performance, Fallon takes a cheap shot at the Commander-in-Chief with the awkwardly proper "Barack Obama," but the First Lady returns the favor with the nerdy pointing of her "Jimmy Fallon." The duo's first "Evolution of Mom Dancing," from a 2013 episode of Late Night With Jimmy Fallon, became a viral video hit thanks to mom-tastic moves like the "Happy Snapper," the "Out of Sync Electric Slide" and the "Just the Hands Part of Single Ladies."