40%

She's the only main pop girl who doesn't have a #1 debut right?

I mean if Taylor, Katy, Kesha, Gaga, and Britney can do it then so can RiRi.

10%, people are over her crazy music videos which is half the reason her songs charted so high

20% for Miley

5%.

30%

90% if she releases the video in the first week

She almost did it with Party in the USA and she would've done it if they managed the Wrecking Ball release better and put out the video the same week, so I'd say 50%

Hmmmm I'm gonna say 50% because Dead Petz happened.

If she had better music + a better release tactic she could've easily debuted @ #1 with ha lead single from the Bangerz follow-up.

50%