Gaga.

Beyoncé.
Lady GaGa will never get another #1.

Beyonce because the gp cares about her MUCH more. She could easily do it if she tried

It's really really hard nowadays to get number 1 for pop girl (besides the new ones)....So it might not happen for those two with their new records but maybe with good collab or viral video...who knows..

Definitely Bey she's a huge streaming force and is more popular than ever rn, only thing that hinders her is lack of promo and not catering to pop

Nah, not really. Drunk In Love started getting radio support for like a second and then all of a sudden it stopped. I dont really understand why though, the song seemed so popular, its strange that it wasnt pushed as much as anyone elses single on pop radio. Not to mention, I heard it more on urban radio than I ever did pop. Whereas Applause had a healthy amount of airplay for around 3-4 months and then fell off completely. It was a fixture on pop radio longer than DIL. Which is odd considering DIL was clearly more popular.

Beyonce is way better than Gaga in everything. So the answer is Queen Bey.