Adele.

Adele, obvs (among current females).

Kelly, she literally doesn't have a hit that isn't a break up anthem

Kelly obviously

I really wanna put Avril Lavigne but her break-up song is more mellow compared to the other ladies which always have anger in their break up song

My Life Would Suck Without You, Breakaway, I Do Not Hook Up (even though only a moderate hit) and soon to be Dark Side all beg to differ.

But yes, Queen Kelly's got this locked up.

"Breakaway" and "A Moment Like This" come to mind.

Funhouse is all about a breakup (and drinking, but mostly breakup up.)

P!nk and Adele fo sho.

Kelly. Who else?

"Dear John">>>>>

I went for Adele but Kelly is a good argument too.

Beyonce

And Miss Independent and A Moment Like This and Because Of You.

Kelly's break up anthems:

Since U Been Gone
Behind These Hazel Eyes
Walk Away
Never Again
Already Gone
Mr.Know It All
Stronger

Kelly is known for break up anthems and she will be remembered for that.

And I can't at people screaming adele. That girl has three hits lol.

The one that sings nothing but break-up songs