Well, this battle is kinda senseless, everybody knows Rihanna is the sexiest African-American girl out there, nobody can copy her at the moment, Nina Agdal is out of Rihanna's league for sure, thumbs down for Nina and 10+ for Rihanna this time, her attitude, her voice, her body, her everything makes her be the best from that duo, no doubt about it.
NO,NO,NO, Rihanna is not the sexiest nothing, half her head is forehead. Straight up opinion buddy, I would never invite her "always on full screen mode" forehead to any party of mines. She is cute,but her voice is annoying, I don't liker her singing, she claims to be too many mixtures and people put her on a pedestal because she is from virgin islands or wherever.
But I would pick her out of these two because Nina has a strong face, and too many sharp features, no meat on them thighs.