So I'll admit, Rihanna isn't the best vocalist in the world, I got no problems with that. HOWEVER, you can't tell me she doesn't hold her own. This is the live performance I've been waiting for, to see her perform Russian Roulette. Rihanna belts out the big ones with very few flaws in this performance on the UK hit series X-Factor. Judge for yourself, but I think she did it justice...