CMM is sstill ahead on both radio and iTunes though, so it could still end up blocking her. Rihanna is somewhat likely too - WHYB is getting to be massive on radio and it only just passed 1 million sales, so it has a very large amount of potential sales left.
"Lights" might not be an issue for a while since it's still selling only a little more than half what WA is.
CMM would be a problem if WY stopped climbing but it's still increasing on the radios and the movie could help WA on iTunes. So she can get the #1 but yes it's going to be complicated.
Gurl, mainly in the US where she already sold 2,2M copies of TD, it's huge for a pop artist.
And stop saying that because she had a lot of hits, she should sell more albums, it's completely stupid, it just shows that she can sell singles AND albums.
Now you're basically proving she's a singles artist.