Rihanna's genre 

No. This is not resolved. Pop is her main genre. I'm sorry but 'R&B; first' thing has to go. Whoever thought of Rhythm and Blue being first needs to learn about music. Rihanna's Signature Songs [[S.O.S (Rihanna song)|S.O.S), Pon De Replay, Umbrella and Don't Stop The Music are not R&B; at all.