"Never know who you're gonna run into at the White House," tweeted Brad Paisley, who was in Washington, D.C., to perform as part of President Obama's July 4 tribute to the U.S. military. Since 2006, Brad's big-headed new friends—caricatures of Presidents Thomas Jefferson, Abraham Lincoln, Theodore Roosevelt and George Washington—have run a race as part of the Washington Nationals' July 4 Major League Baseball home game.

photo courtesy Brad Paisley Twitter