In reply to Honestly Truly.

@SMH You are the one who needs to check your facts. Where are your receipts? The ones you mention (RIAA, Nielsen Soundscan, and Billboard) are all invalid because RIAA does not account for record sales before 1954 and Nielson Soundscan does not account for sales before 1991. Just because TLC is considered the highest selling group that does not necessarily mean it is true:

https://en.wikipedia.org/wiki/List_of_best-selling_girl_groups