In order to succeed in sports you have to have the killer instinct. Unfortunately this mentality sometimes leads people of the sports world to venture from competitive to downright nasty.
Some women in the sports world have shown their stripes over the years, and now we know them to be some of the meanest women we've ever seen.
But it would be no fun to have the likes of Marge Schott topping the list, so we're only going to include mean girls who also happen to be pleasing to the eye.
Here's a list of the 20 hottest mean chicks in sports.
Who: Gloria Govan - Basketball Wives cast member, fiancee of Lakers forward Matt Barnes.
Evidence: Govan had a publicized dispute with Shaq's ex-wife, Shaunie O'Neal, during her stint on the show. Things got heated in a restaurant as shown here.
Mean Chick Scale: 6.0 - while she's definitely mean, it looks like it's largely retaliation to a bully.
Who: Caitlin Davis, former Patriots cheerleader.
Evidence: The New England Patriots took a risk when they allowed 18-year-old Caitlin Davis on to the dance team, and the young hottie quickly got herself into big trouble. One of Davis' friends passed out at a party and Davis apparently drew all over her with a marker, including a few inappropriate markings that got her thrown off the Patriots squad.
Mean Chick Scale: 6.0 - a childish prank, but washing off all that writing would take a long time.
Who: Kim Zolciak - star of Real Housewives of Atlanta, significant other of Falcons defensive end Kroy Biermann.
Evidence: Zolciak is known for having one of the housewives' biggest fights with fellow cast member NeNe Leakes.
Mean Chick Scale: 6.5 - maybe it's for the cameras, but there's no denying the meanness in those eyes.
Who: Carrie Underwood, winner of American Idol season four, wife of Nashville Predators' Mike Fisher.
Evidence: Underwood may have a wholesome exterior, but inside she's mean. In early 2011, she seemingly forced the Ottawa Senators into dealing her Canadian husband Mike Fisher to the Nashville Predators so that he could be closer to her.
Mean Chick Scale: 6.5 - not the meanest thing I've ever seen, but don't tell that to Ottawa fans, who miss their Ontario-born star.
Who: Vanessa Perroncel - model and ex-girlfriend of soccer player Wayne Bridge.
Evidence: Perroncel allegedly had an affair with Bridge's teammate, John Terry. The scandal threw Terry's captainship into jeopardy and the timing could not have been worse as England prepared for the World Cup.
Mean Chick Scale: 7.0 - if the rumors are true, she was responsible for crushing England's World Cup hopes...that's pretty mean...
Who: Tami Roman - star of Basketball Wives, Real World: Los Angeles cast member, ex-wife of former NBA player Kenny Anderson.
Evidence: Tami had an infamous feud with fellow Basetball Wife Evelyn Lozada, which came to blows during one episode. She's also known for overreacting to an incident and getting her roommate Kevin kicked out of the house during her Real World stint.
Mean Chick Scale: 7.0 - there's really no hint that she's doing this for the cameras, as Tami genuinely seems like an angry chick.
Who: Erin Barry, ex-wife of former NBA player Brent Barry.
Evidence: After NBA super-couple Tony Parker and Eva Longoria announced their plans to divorce, it came out that Parker allegedly had an affair with Erin Barry.
Mean Chick Scale: 7.5 - I know we like to blame the woman, but if the affair happened then it was Tony's fault as well.
Who: Evelyn Lozada - star of Basketball Wives, ex-wife of NBA player Antoine Walker, current fiancee of NFL receiver Chad Ochocinco.
Evidence: Lozada is one of the many Basketball Wives cast member who likes to scream a lot and get into fights. Here is one of her many examples.
Mean Chick Scale: 7.5 - mean, but a slight sense that she's only doing it for the cameras.
Who: Alex Curran - wife of soccer player Stephen Gerrard.
Evidence: In 2006 Curran was arrested after a fight in a bar, when she allegedly struck another woman in the head with a bottle.
Mean Chick Scale: 8.0 - lots of people get in fights, but your ferocity truly shows when you reach for the bottle.
Who: Carmen Electra - ex-wife of former NBA rebounding star Dennis Rodman.
Evidence: Electra was arrested (along with Rodman) in 1999 for a domestic disturbance. Rodman alleged that Electra woke him up in bed by poking him with a rose stem and then punching him. After a scuffle, it was also reported that Electra "began punching him about the body." Rodman checked into jail with a bloody lip.
Mean Chick Scale: 8.0 - it's hard to imagine Rodman didn't provoke whatever attack happened, but from the report Electra sounds pretty feisty.
Who: Serena Williams - former world No. 1 women's tennis player.
Evidence: Serena Williams took exception to a call during the semi-finals of the 2009 US Open and decided to voice her displeasure. She threatened the line judge who had just called Williams for a foot fault, saying, "I'm going to shove this ball down your f------ throat."
Mean Chick Scale: 8.0 - Williams' outburst, along with her body frame, make a fool out of the man who dares challenge her.
Who: Naomi Campbell - famous supermodel, ex-girlfriend of Mike Tyson.
Evidence: Where to start? Between 1998 and 2008, Campbell was accused ten times of committing acts of violence against employees, associates, and, in one instance, police officers. You can look at the full list, but the meanest has to be her go-to move, the cell phone assault.
Mean Chick Scale - 8.0 - she even scared away Mike Tyson...
Who: Angela Keathley - former Carolina Panthers cheerleader.
Evidence: You may remember Keathley as one of the cheerleaders that was arrested for allegedly having sex in a bar bathroom. What you may not remember is that they also beat up the lady who started yelling at them for taking so long in the bathroom. Keathley, who was reportedly too drunk to stand, was belligerent with the cops.
Mean Chick Scale: 8.5 - while her acts were pretty mean, a lot of people do uncharacteristic things while they're blackout drunk.
Who: Renee Thomas - former Carolina Panthers cheerleader.
Evidence: You can't have one without the other. Thomas was the instigator of the fight and actually punched the angry bar patron in the face. She's clearly the meaner of the two.
Mean Chick Scale: 8.5 - any girl who punches another girl is definitely mean.
Who: Minka Kelly - actress, fiancee of Yankees legend Derek Jeter.
Evidence: Kelly, who has had some run-ins with fans before, seems to take a disliking to when Derek Jeter talks to cameramen.
Mean Chick Scale: 8.5 - you know you're mean when you don't even have to say anything—you just shoot your boyfriend a look and he knows he's in the dog house.
Who: Anna Benson - wife of former MLB pitcher Kris Benson.
Evidence: All you need to know is what she told Howard Stern on his radio show:
"I told Kris because that's the biggest thing in athletics, they cheat all the time. I told him, cheat on me all you want. If you get caught, I'm going to (bleep) everybody on your entire team, coaches, trainers, players. Everybody would get a turn. If my husband cheated on me and embarrassed me like that, I will embarrass him more than he could ever imagine."
Mean Chick Scale: 9.0 - I don't care if she ever made good on the offer, just saying that is incredibly vicious.
Who: Lauren McDonald - former girlfriend of soccer player Maurice Edu.
Evidence: McDonald is a WAG famous for getting into a fight with fellow WAG Leah Shevlin. Shevlin found out that McDonald had quickly jumped on her ex, Fraser Black, after the two broke up. The two soccer girlfriends apparently got into a catfight at a club one night which resulted in Shevlin being left "bloodied and bruised." I guess we know who won that fight.
Mean Chick Scale: 9.0 - we don't know who started the fight, but McDonald definitely finished it.
Who: Tawny Kitaen - actress, model, ex-wife of MLB pitcher Chuck Finley.
Evidence: Kitaen and Finley split after she kicked him repeatedly with her high-heeled shoes while he was driving her home.
Mean Chick Scale: 9.5 - She'd be a 10.0 on the crazy scale because she obviously has a screw loose, but kicking the crap out of your husband still makes you pretty mean.
Who: Vanessa Bryant - wife of NBA star Kobe Bryant.
Evidence: Vanessa is known for causing problems by meddling in the affairs of her teammates, but that's not the meanest thing she's done. In 2009 her housekeeper sued her for horrific treatment, including an incident where Vanessa Bryant reportedly forced the housekeeper to stick her hand in a bag of dog feces to retrieve the tag of her blouse.
Mean Chick Scale: 9.5 - if the speculation is true, Bryant is one mean chick.
Who: Carmella DeCesare - 2004 Playboy Playmate of the Year, WWE Diva, wife of former NFL quarterback Jeff Garcia.
Evidence: DeCesare was arrested in 2004 for allegedly kicking a woman named Kristen Hine in the head during a fight at a nightclub, but that's only the beginning of the story. It turns out that Hine is the ex-girlfriend of her husband, Jeff Garcia, and that DeCesare had already made threatening phone calls to Hine saying, "I know what you look like. I know the places you go. My friends know who you are and we will come find you."
Mean Chick Scale: 10.0 - if it was just the fight her score would be lower, but the premeditated phone calls make her the meanest hot chick in sports.