Despite being a huge underperformance (1.3M sales - #29 peak), it was really huge in pop culture and still is a big streaming hit even in 2016.
It has 100M+ plays on Spotify and still gains about 200k views a day on Youtube.

Can we say it is the most iconic flop single? If not, which one is?

Definitely one of them.

Longevity.
Beyonce.
One of her best ever.
Song & Video.
Definitely remembered.

Can anyone who says no back it up?

One of them

Well I'm glad it flopped with inital release tho. I never liked it.

No. It's not iconic. It's a flop!

Wow, I wasn't even aware it peaked so low in the US. No wonder people hate it when it's a great song.

And yes. It's MASSIVE in pop culture, definitely in Britain anyway. Go-to song for all female dance troupes.

Um no. This Is How We Do >>>

No one knows it.

Yes, it is

"Not Myself Tonight" tho, first official flop single of ha generation of pop girls.

It's never mentioned + gets like 10k views a day ()

its not really a flop but i see what you mean

Yes, it is also her best song

I don't think so. There are a lot of iconic songs that never made it into the Top 40. Purple Haze, Solsbury Hill, Forever Young, My Generation, Rock Lobster and Once in a Lifetime, just to name a few.

Man Down - Rihanna

#59 peak
~400k YT streams every day (410M total YT views)
At least 2 million copies sold in the US
70M Spotify streams

It was not a flop though + was a 5th single