Playboy's Erica Chevillar hosted the MMA Xplosion Ring Girl Competition at Crown Nightclub in Las Vegas over the weekend.

The pinup was originally a 10th grade history teacher at West Boca Raton High School. She made headlines in 2006 for moonlighting as a swimsuit model - an activity school administrators didn't think was appropriate.

She became known as the "Bikini Teacher" and began a lucrative modeling career. She was featured in the March 2007 issue of Playboy magazine in a spread called "Hot for Teacher." She was also a Maxim Hometown Hottie 2007 finalist.

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