UFC ring girl Arianny Celeste says ... just because you don't have a HUGE booty, doesn't mean you don't have a great booty ... and she's got the pics to prove it. Celeste just posted a blog explaining how people with "perky" butts can still steal the spotlight in a bikini these days ... and she makes a pretty compelling visual argument. "We live in a world now where it?s all about the booty! I like to work out regularly, but let?s face it, I?ll never have a huge booty!"??