A closer look at the superstar trio who rose to become one of America's most successful vocal groups with hits like Where Did Our Love Go and Love Child.

A look at the music of Chicago. Formed in the 60s, they topped charts with songs like If You Leave Me Now, and remain one of the world's best selling groups of all time.

The story of Journey, one of the world's best-selling bands of all time. Many of their hits, including Don't Stop Believin', remain firmly embedded in popular culture.