Probably Rihanna,Shakira,Katy,Gaga,Madonna tbh (But Adele is the biggest star and Lana is pretty big too)
Also I don't know anyone in real life that listens to Beyonce xD
Beyonce isn't one of the strongest selling pop girls here in Canada but she's bigger than Rih, Katy, Adele and Taylor when it comes to star power, relevance, etc. Also, Beyonce's concerts in Canada sell out very quickly.
No one else is in their ranks. Rihanna and Katy Perry don't have the amount of respect among the general public they have and are not as powerful. Those four will go down in history as the female pop culture icons of our time.