Using my fave as an example when she debuted she got massive cause she had her own unique style and she carried herself with a certain aura and she commanded attention.
The mysterious way she acted got a lot of people interested in her (back in 2009 it was almost as if she wasn't human, to me anyway, and i found it really intriguing)
You just know. They have this unexplainable presence surrounding them.
Tinashe doesn't stand out.
Bey is the glam diva.
Rih is the vivacious, rebellious, fashionista.
Britney is/was the teen sensation
Gaga is the edgy popstar w/ the outlandish costumes
They just have "IT"... it didn't happen overnight tho. Rih really broke out in 2007