Erin Toughill started out in kickboxing before getting into Brazilian jiujitsu. In 1999, she kicked off her career as an MMA fighter and tore through opponents with relative ease. In 2004, she became the No. 1 ranked female MMA fighter after KO'ing a previously undefeated opponent. Erin Toughill also boxes, and fought Laila Ali in 2005 in what some argue was the most violent female boxing match ever; Toughill lost the match. Last year, she retired from boxing and MMA and, in an ironic turn, now plays the character Steel on American Gladiators which Laila Ali hosts.

Michelle Waterson is an up-and-coming MMA fighter who's referred to as the "Karate Hottie" for her obvious good looks. Her claim to fame was a 2006 reality show called Fight Girls. The show followed a group of 10 aspiring female fighters working their way through Muay Thai ranks to fight in a championship in Thailand. Waterson didn't win the title, but is still fighting on the MMA circuit. Currently she has a 1-2 record, and admits supplementing her income as a Hooters girl. Clearly with her looks, she stands to cash in for a lot more than tips on burgers and fries.

Gina Carano has developed a reputation as one of the toughest female Muay Thai fighters in the world. After building a 12-1-1 record she was invited in 2007 to fight in one of the first female sanctioned events in Las Vegas. She won by unanimous decision. Since then she remains undefeated as an MMA fighter with a 6-0-0 record. Gina Carano also starred on the reality show Fight Girls as a mentor to the women on the show. Plus, she's scheduled to star in a movie and play a character in a video game. Her other big hit: She plays Crush on American Gladiators. All of this exposure came to a head on May 13, 2008, when Gina Carano was the third most searched person on Yahoo! and first on Google on May 13, 2008.

Kyra Gracie is a Brazilian MMA fighter with a black belt in Brazilian Jiu-Jitsu (BJJ). Kyra Gracie comes from a long line of BJJ in her family and has tons of hardware to show off her own success. Kyra's a five-time BJJ winner at the Pan Am Games and three-time World BJJ Champion. To cash in on her fame, Kyra Gracie runs a store from her official website that sells everything from T-shirts to fight shorts.

Sarah Ponce has won four kickboxing titles, she fights proficiently in the San Shou and Muay Thai styles, and she's 12-1-0. But Sarah Ponce doesn't stop there; she also takes her show out of the ring and poses in front of the camera as a model. Clearly, she's good at it, because she's racked up several big modeling shoots, including the cover for Swimwear Illustrated Magazine. Don't drool too long; Sarah Ponce admits she uses her looks to her advantage and encourages people to think of her as an airhead model. Once their guard is down she puts them down for the 10 count.

Mia St. John has a long career as a fighter. In college, she started in tae kwon do and compiled a 27-1 record. She then got into boxing and kicked it off professionally in 1997. Mia St. John regularly fought four-round contests for Top Rank Boxing on the undercard of De La Hoya bouts. This earned her the nickname "Queen of the Four-Rounders". In 1999, she posed nude for Playboy, which won her plenty of attention. She retired from Top Rank Boxing in 2001 with an 18-3-1 record, but still boxed in other arenas. In 2005, she won the IFBA Lightweight World Title and in 2008 she won the WBC International Female Welterweight title. Her current record is 44-9-2.