It's that time of year. The porn stars, strippers and booth babe models of the world are convening in Las Vegas with their respective managers/boyfriends/clients for the annual Adult Entertainment Expo (AEE).

Yes, this is also when the "Oscars of porn" go down with the kind of red carpet fanfare one can only expect from an event that almost literally revolves around tits and ass.

Having attended AEE and other similar adult industry trade shows throughout the years, it's become almost a game guessing which girls on my flight are "models" I'll be seeing at that night's porn party and which are just chicks with bad taste.

There are several telltale signs that distinguish the "kittens" in the litter - next time you're on Southwest heading to Vegas or people-watching during a layover in New York, see if you can spot one. It's like "Where's Waldo?" but with bigger boobs.

1. Hello Kitty.

This childhood brand beloved by little girls with Lisa Frank lunch boxes has been adopted at large by the porn star community. Whether it's a desire to preserve their youthful innocence or simply an uncontrollable attraction to all things pink, porn stars love Sanrio's signature little white kitty with big eyes and a bow in her fur. Look for the design adorning luggage, wallets, jewelry and even their skin - Hello Kitty tattoos are almost as rampant as Playboy bunny tramp stamps.

2. Acrylic Nails.

It's not uncommon to see unusually perfect nails on the hands of women working in the professional world, but when you see a young lady at Starbucks holding a $20 bill with fingers adorned by long, square-shaped talons, there's a chance she's caffeinating herself in preparation for a long day signing autographs.

3. Giant Sunglasses.

Women wear big, round sunglasses indoors for a variety of reasons, ranging from hiding their identities to dealing with a hangover. But a gal sporting these bug-eyed lenses, often with a large shiny brand name along the side, just might be concealing her face from anyone who might recognize it from that bukkake compilation DVD she starred in last year.

4. Glitter.

This is especially relevant the day AFTER AEE and the porn Oscars end. Traces of the previous night's cosmetic accessories likely will remain in performers' hair, under their fingernails, covering their clothes, and especially on their skin. So if you notice the flat-ironed blond to your left sparkles in the fluorescent light, there's a chance she spent the last few days under the unflattering lights of a Vegas exhibit hall.

5. Sweatsuits.

Juicy Couture-style twinsets remains a top seller of matching sweatpants/sweatshirt ensembles, and their bright-colored terrycloth - sometimes with a rhinestone logo or pair of pockets adorning the rear end - remain popular travel attire for women in the "biz." Black and pink are common color choices, and if you see one walk by wearing massive sunglasses with a Hello Kitty carry-on, you're winning.