Seventh-inning stretch standard “Take Me Out to the Ball Game” is a waltz that starts with an octave jump. At 100 years old, it is third on America’s most-sung songs list after “Happy Birthday” and the national anthem. It has been recorded by more than 400 musicians. You could argue that it’s helped keep Cracker Jack alive after all these years. Jack Norworth wrote the song in 1908 and it was sung in movie theaters during reel changes. In the mid-1970s Chicago White Sox and then Cubs announcer Harry Caray popularized it as a singalong in the seventh inning and the tradition soon took hold in ballparks across the country.