One of the things I've always found fascinating/scary about auto shows is the models. Not the vehicle models. The models . My earliest auto show memory is of a sequined damsel in a shimmering gown standing on a platform and telling my father -- via a microphone even though he was only 10 feet away -- about the crimson Mercury Cougar slowly revolving behind her. My attention kept darting back and forth -- car, woman, car, woman. As if at 12, I wasn't already hormonally frustrated enough. Jeep product presenter and narrator Alison Fiori stands next to a 2013 Grand Cherokee Overland at the O.C. Auto Show. This Jeep is more luxurious than in past years, says Fiori. What: 500 vehicles from 35 manufacturers; 100 available for test drives on site. Where Anaheim Convention Center, 800 W. Katella When Sunday: 9 a.m. -- 7 p.m. How much Adults (13 and over): $10 Seniors and military: $6 Under 13: Free Much has changed at auto shows -- no sequins, no hand-held mics, no Mercurys, and they no longer call the women "models" -- but they still use women to sell cars to men. "Sirens of chrome," is what agent Margery Krevsky dubbed them in her book, "Sirens of Chrome: The Enduring Allure of Auto Show Models." Cars don't have as much chrome as they used to (and "sirens of carbon fiber" doesn't have the same ring), but there are still lots of sirens at auto shows. And at this week's Orange