The Spencer Davis Group: Gimme Some Lovin'
Steve Winwood was only 17 years old when Spencer Davis recruited him as a vocalist in 1965. Now all of these years later most people don't remember much about Spencer Davis but Winwood went on to have a legendary career that has spanned multiple bands and decades.
The Spencer Davis Group only had a couple of hit songs before Winwood left the band to form Traffic. Without their dynamic frontman SDG foundered and Davis spent much of the rest of his career as a producer for other acts.
Interestingly, the only other major hit that The Spencer Davis Group produced was I'm A Man, clocking in at 3:01. So these guys were true forerunners of the perfect pop song!