At some point, 1989 will sell the same amount of copies as IASF did.
Both eras were huge and got WW smash hits. The 1989 era ain't over yet but I still see similarities.

Which era is bigger in your opinion?

You did this because how bad they dragged Rihanna in that other thread

IMSF

In terms of singles success:

SIO > Single Ladies
Halo > Blank Space
Style > Sweet Dreams
Bad Blood > Diva, Ego, Video Phone

So, 1989.

The global one, I Am Sasha Fierce

Single Ladies and If I Were a Boy alone >>>

1989 is probably one of the biggest era's a pop girl has had along with Teenage Dream and TFM.
While Beyonce has many successful consistent era's it's hard to pinpoint which one was most successful.

1989 of course.

Single Ladies > SIO, Blank Space, Style, Bad Blood, 1989's fifth single

So, IASF.

Sasha by far

Um 1989. It outsold IASF in 2014/2015 (when album sales declined). The singles & videos are bigger as well.

IASF sold 6M WW. 1989 is at 9M already.

1989 by really far.

Impactful IASF.

Why are you saying at some point?
IASF was confirmed to be at 7.5m this year by mediatraffic. 1989 is already at 7.6m in 8 months
OT:1989

Do you guys not realise how massive 1989 is, especially for this time. You can easily say it's the most successful Era of 2014/2015 without hesitation, whereas if we talk about what the most successful era of 2008 is; there's way too many to decide from.
Single Sales: Taylor = Bey (Despite 7 yr difference)
Album Sales: Taylor > Bey (Despite 7 yr difference)
Tour: Taylor >>> Bey.
Awards: I have no idea

I Am... Sasha Fierce!

But I voted for #pray4R8