Consider "dark" music, performances (choreo?), style, etc.

Honestly, I dont think so. However, she did step up her game when gaga arrived on the scene

Not in the slightest.

Yes

Yup.

+1

She did get a little.. weirder..

No.

No, she's always been doing her own thing.

Not to mention that she doesn't really dress up in whacky and controversial outfits unlike her contemporaries (nicki and katy).

She stepped up her game on March 29, 2007. Long before Gaga was thought of.

I think this counts as influencing.

It's just an ATRL poll, don't get upset.

Would love to see proof of this.

Rihanna was doing what Gaga did during The Fame Monster era WAY before during GGGB/Rated R. So nope.

No, but I think Rihanna inspired Lady Gaga to have more successful U.S. singles.

Hell no

...no. Not really. The only thing I could possibly think of was the "dark" image for Rated R but she had that in GGGB and definitely in Disturbia which was released before Gaga was big or had a dark image. So no.