I would agree that in mainstream America, she probably is the #1 star right now. Not because she's the best or anything like that, but because she's a hot chick that is pro fighter, and they keep sticking mics in her face.
Being the biggest star really doesn't mean anything. Kate Upton was pretty popular for awhile and she got famous by posting bikini pics on Twitter.
You know why people have eyes in the front? Because they have to move forward to see the landscape in the distance. If you had eyes in back all you could see is your home town getting farther away; you can't move forward like that. If your eyes are in front what you see in the distance keeps getting closer. That's what lets people move forward.