"Buttered Popcorn" was written by Motown president Berry Gordy and
songwriter Barney Ales, and was released as a Tamla label single by
The Supremes. It was the group’s second single since signing with
Motown Records. This is not only one of the rare singles to feature
Florence Ballard on lead, but the only one with her as the sole lead.   
   

The original Supremes (left to right) Mary Wilson, Florence Ballard and
Diana Ross.

Berry Gordy in the recording studio with the Supremes