Photos of the Year 2011
May 3: Beyonce surprises students in Harlem as part of Michelle Obama's 'Let's Move' initiative.

Michelle Obama and Beyoncé are taking their own advice. Last week we reported that the two were partnering to fight childhood obesity via the "Let's Move! Flash Workout" campaign, and now we see both shaking it (remember, for a cause) alongside middle schoolers to Beyoncé's "Move Your Body."

First Lady Obama keeps it subdued as she brreaks it down at a D.C. school, but it is worth noting that no one needs to teach her how to "Dougie" -- she's got it down already. Also the case with the "Running Man," which Mrs. Obama tackles. Watch below.

VIDEO: Cali Swag District Teaches You 'How to Dougie'

Beyoncé surprises Harlem middle schoolers at PS 161 as they practice her moves from the new "Move Your Body" video, which was created to promote the "Let's Move!" campaign. B, you just made these girls' lives!