How can one figure out world wide albums sold? I'm curious to see how Britney's "Glory" did overall. 92k in US. She debuted #2 in UK with how many sold?
If she broke 200k WW, then in the end that's all that matters.
Look at Resident Evil. It's domestic is beyond horrible, but foreign makes it so popular and successful. It's not Britney's (nor Resident Evil's) fault America has poor taste.