I'd say it's Halsey. So underrated for some reason

Adele

Lucia Cole

A source as reliable as The Sun announced that Lady Gaga might be debuting a new song at the VMAs and the entire forum went into full drag mode so I'm going to say it's her.

GP-wise, probably Miley.

Rihanna is up there. It hurts when people call her untalented but she still destroys everything

Beyoncé too. She simply destroys everything and it just hurts the lessor's

In fact the black girls get a lot of hate. I'm calling racisme!

Careful calling Halsey a "popstar", ATRL won't agree :P !

But I'll have to say Halsey too.

GP:
Justin Bieber
Kanye West
Lady Gaga
Nicki Minaj
Iggy Azalea

Halsey is barely known by the GP. She's just hated by twitter stans and trolls.

So stan wise:

Demi Lovato
Halsey
Iggy Azalea

Rihanna gets trolled a lot on ATRL but nowhere close to the levels of Britney, Gaga & Beyoncé (talking about main pop girls).
Wasn't she voted ATRL's favourite main pop girl or something?

Taylor Swift, Justin Bieber, Iggy Azalea, Beyonce

Madonna

Madonna

Why are people saying Rihanna and Beyonce?

I don't think Miley's still getting the hates like she did in 2013, especially with her current long hair and upcoming The Voice, the GP will probably move on.

Madonna, no competition.