Although it's probably not marked on many of your calendars, today is international Pi Day! No, I'm not talking about apple pie, pumpkin pie, or even banana cream pie; I'm talking about pi, that seemingly never ending string of digits that starts out 3.14159 and is part of the relationship between a circle's diameter and circumference.
Rock on all you math geeks out there!
Don McLean - American Pie - Parts I & II : Rock Is Dead, But It Won't Lie Down
Ella Fitzgerald & Louis Armstrong - Petootie Pie : Vocal Duets
Warrant - Cherry Pie : Cherry Pie
Led Zeppelin - Custard Pie : Physical Graffiti