Look at this list of alleged best selling female groups of all time. The Supremes just barely made the top ten. I know this is just Wikipedia but I've always wondered if the supremes were really the biggest female group of all time. The Pointer Sisters, for instance, had as many top tens as the Supremes and if you add that to the fact that during the 70's/80's [[the Pointers' heyday), everyone had stereos and bought records. That was not the case in the 60's so I'd imagine all the groups ahead of the Supremes on this list really did sell more records.
https://en.wikipedia.org/wiki/List_o...ng_girl_groups