Conversation so far:
How was the success of The Cardigans' first popular song?
The Cardigans' Lovefool was a hit worldwide, particularly in the US and Japan, where the album reached platinum status in three weeks.
Did The Cardigans have other great hits?
The Cardigans have an assortment of hits

Question: What were their record sales like?
Self-contained rewrite: What were The Cardigans' record sales like?