Have to credit my local radio board for this reference. There's a subsite on YouTube that features a whole lot of bizarre audio from the past, including radio station jingles, old TV themes and others. But after investigating it, the one thing I found really interesting is a series of old Coca-Cola radio spots featuring some of the biggest stars of the 60s.

The one that especially caught my ear was the one below from The Supremes, a commercial made to sound for all the world like "Baby Love." It's a bit fascinating to hear them do takes of their famous hits in an entirely different way. 

The same site also features Neil Diamond, Jan & Dean, Tom Jones, The Newbeats, Gladys Knight & the Pips and whole lot of other 60s hitmakers, all singing the praises of a certain soft drink. You'll have to do a bit of scrolling to find out who else is there, but these are the "unheard" hits, if you will, of some of the biggest artists of the 60s!