floria wrote:BTW most probably will be the last POP album that has passed 5 million copies.

Not really. Just because Gaga, Madonna and Britney might not be able to do so again doesn't mean Rihanna, Adele, Bruno Mars, Coldplay, Katy Perry or any newcomer can't either.
Actually I'm pretty sure Talk That Talk will pass 5 Million in early 2013 even though it's much less Pop than her older albums, Mylo Xyloto will do it in the next few months, Adele's next album will sell 5 Million in two or three weeks, Bruno Mars is expected to have a new successful era too this year and Katy is still out there as well.