It’s probably the most well known “B” side ever released, Chicago’s “Colour My World”. It was so popular that it was the B side for two songs; “Make Me Smile” in 1970 and “Beginnings” in 1971. So, the song was in the top ten two years in a row, with different “A” sides. Regardless, the song was hugely popular, and used for prom themes across the country. Today, you never hear it… another forgotten oldie.
Picture of actual Columbia single.