In Season 1 Episode 1 "It's a Fae,Fae,Fae,Fae World" at the glass factory seguinte to the Ash is this Rihanna?

No, the Cast members from lost Girl are all Canadian, and she is from somewhere in the Carribean. So i dont think its her.

Not sure, probably not. But who knows, definitely could be. It sure looks like her ;)