Gaga by far

Shakira and Madonna

Britney.

I've heard that large foreheads mean people have larger brains, and are more likely smarter as a result. So I vote Rihanna.

Lady Gaga, Alicia Keys, Shakira, Madonna, Beyonce.
Voted Gaga since Shakira is not listed

Yeah the ke$ha shade is becoming so old and tired. It has been proven she's very intelligent and articulate, as you can see in her interviews.

I digress, but from the list obviously Gagz.

Gaga.

I don't think any of them (besides Gaga) are like, books smart.

But they are all business smart

i'm not basing someone's iq based on someone's music.

Gaga, obviously.

She is the one with highest IQ for sure.