Chicago has wrapped up just about every show they've ever played with this 1970 classic, even as they've changed their lineup ...

For decades, fans debated the meaning behind its cryptic title, but the story behind this classic hit is far simpler—and more relatable—than most people realize.

You know it when you hear it, but do you know what it’s actually about? Chicago’s landmark single “25 or 6 to 4” has been the source of many a conspiracy theory, from gambling predictions to code for ...