US President Barack Obama (R) listens to

US President Barack Obama (R) listens to Paul McCartney as he speaks after getting the third Gershwin Prize for Popular Song at the White House in Washington, DC on June 2, 2010. McCartney's appearance was part of a two-day series of events marking the award issued by the Library of Congress. AFP PHOTO / YURI GRIPAS (Photo credit should read YURI GRIPAS/AFP/Getty Images)