UFC's Arianny Celeste -- Perky Butts Are In ... Here's Proof

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! Mines perky and I like it that way," Celeste writes.

Arianny says the key to showing off your physique by the pool starts with picking the right suit.

She chose wisely.