There is nothing alpha about Rihianna. That's the type of chick who is fine but is socially retarded/immature so she stays jump-off status. Let's say you have Michelle Obama, Beyonce and Rihanna all in the same room.
Michelle Obama while not your video vixen beauty is regal and classy.
Beyonce is so damn pretty she gets a pass. In any discussion all she would have to do is smile and nod.
Rihanna? Now wtf would she be doing. You can't take a chick like that anywhere important. I wouldn't even call her a "hippie" cause most of those chicks usually are educated or pan-African types.
Rihanna = jump-off chick
Keri Hilson = The chick you date while smashing Rihanna on the side and waiting till you get a Beyonce type.