Rihanna with 4 albums on the list
I thought she wasn't big in the U.S?

Gaga with 2 albums in top 10 and all her solo albums being on the list

TFM EP is also in the list with 1M+ sales so if you combine them as TFM is TF's re release in the USA, then TFM is far ahead.

02 - 4,460,000 - SPEAK NOW - Taylor Swift
03 - 4,129,000 - RED - Taylor Swift
04 - 3,661,000 - 1989 - Taylor Swift
15 - 1,555,000 - FEARLESS - Taylor Swift
39 - 851,000 - TAYLOR SWIFT - Taylor Swift

Tell em boo!!

3.2 isn't FAR ahead of 3

I didn't know Teenage Dream outsold Born This Way.

WOW at bey. Slay me

And wow at taylor swift already releasing 3 albums this decade

The list is missing Rated R, which did somewhere in the 500k region this decade, I believe.

My top ten included only sales from this list.

03 - 4,129,000 - RED - Taylor Swift
04 - 3,661,000 - 1989 - Taylor Swift
05 - 2,940,000 - TEENAGE DREAM - Katy Perry
06 - 2,341,000 - BORN THIS WAY - Lady GaGa
07 - 2,220,000 - THE FAME - Lady GaGa
09 - 2,180,000 - BEYONCÉ - Beyoncé
10 - 2,039,000 - THE TRUTH ABOUT LOVE - Pink
11 - 1,938,000 - PINK FRIDAY - Nicki Minaj
16 - 1,555,000 - PRISM - Katy Perry
18 - 1,448,000 - ANIMAL - Ke$ha
19 - 1,434,000 - 4 - Beyoncé
22 - 1,325,000 - GREATEST HITS…SO FAR - P!nk
24 - 1,201,000 - LUNGS - Florence + The Machine
25- 1,196,000 - BORN TO DIE - Lana Del Rey
31 - 1,027,000 - THE FAME MONSTER (EP) - Lady GaGa
35 - 967,000 - CEREMONIALS - Florence + The Machine
36 - 901,000 - PINK FRIDAY: ROMAN RELOADED - Nicki Minaj
37 - 861,000 - WRAPPED IN RED - Kelly Clarkson
42 - 801,000 - FEMME FATALE - Britney Spears

Rated R is on the list at #50, and you counted it in your total for Rihanna., but Rihanna has only released 3 albums this decade not 4.

Taylor´s debut album from 2006 being on the list

Not taylor swift making it when it's 8 years old

Lana

Who even said that though?

She's released 3 albums this decade
And rated r came out a few months before the tracking period
All of every other popgirls releases this decade made it too.
But everyone knows she's big in the us.

The Queen of Pop can't outsell a 2008 album?

28 - 1,104,000 - STRONGER - Kelly Clarkson
37 - 861,000 - WRAPPED IN RED - Kelly Clarkson