So let's count:
US - 2.2 mil
UK - 1 mil
Canada - 500k
Australia - 280k (4 plat?)
France - 200k
Fermany - 200k
Japan - 100k
Brazil - 60k
Mexico - 30k
Argentina - 30k
Phillipines - 20k
Colombia - 10k
-------------------------
4.630.000 known copies.
Oh... I forgot:
Another world - 870k.
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5.5 mil copies sold. So her label's estimates are right