The White House posted a photo:

First Lady Michelle Obama participates in a tug of war with Jimmy Fallon in the Blue Room of the White House during a “Late Night with Jimmy Fallon” taping for the second anniversary of the “Let’s Move!” initiative, Jan. 25, 2012. (Official White House Photo by Chuck Kennedy)

This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.