If you've been to a Major League Baseball game, you have probably experienced the 7th inning stretch (or 8th inning if you're the Boston Red Sox). After sitting for a couple of hours, the stretch gives fans a chance to recharge for the rest of the game. And each team has it's own version.

Let's see how they do it at Wrigley Field, which celebrates its 100th year in 2014 and is home to the Chicago Cubs. It's usually a live performance of "Take Me Out To The Ballgame" with the crowd singing along: