I don't know who will come out on top but what I do know is that Britney, Beyonce, and GaGa will have successful eras with good album and single sales. I see Rihanna having a couple hit singles but thats it. Teenage Dream is mostly done.
Your sales are correct. But her overseas numbers are massive compared to her U.S. numbers.
But Satellites referred to two albums, and the only country that matters where she had two albums was the USA. WW she only released 1 album, so I didn't bother to post that
Gaga can do this. The long waited question "will she be able to top herself" will soon be awnsered.
That question will be asked and asked again for eternity.