Any skinny chick can look good in a slutty nurse or sexy police officer Halloween costume, but there are a few costumes only a fit chick can pull off.  If you’ve got the muscles, I’ve got some costume ideas just for you:

Rosie the Riveter

To pull off the ultimate war-time, bad ass chick, all you need is a red bandanna, some coveralls, a bulging bicep ,and a “We Can Do it!” attitude.  Oooo, sexy and historical.

Serena Williams

Even though she claims to not like her thighs, there is no denying that woman is BUILT.  Put on your cutest tennis skirt and shoes, grab a racket and start screaming.  Line judge’s head on a stick optional.

American Gladiator

I highly recommend going for the old school, eighties Gladiators over the short-lived recent cast- cause their outfits were WAY cooler.  Find an old high school wrestling singlet, a football face mask, and a giant Q-tip and you’re ready to kick some butt.

Jillian Michaels

To pull this one off, you must not only have the most fantastic arms anyone has laid eyes on, you must also be no more than 5 feet tall, and walk around with your hands on your hips, one hip popped to the side, and a perma-scowl-smirk on your face.  Yeah, I don’t know how she pulls that last one off either.  Sweats and a tank should suffice, but for accessories make sure to carry around a lot of Ziplock bags, some Biggest Loser protein powder and very little patience.  Also be sure to scream at passersby that they are pathetic.

Dara Torres

Of course, a US Olympic swim suit would be perfect, but for “everyday Dara” wear a tiny black bikini and carry around a baby girl to keep strangers asking themselves, “how can she possibly be 41, have a baby and look like that!?”

Maggie Fitzgerald (Million Dollar Baby)

French braids, taped fists and shiny shorts will complete this costume, as long as you have the guns, abs and left hook to back it up when challenged.  Those punk kids who want to steal your candy can be brutal.

Dancing With the Stars Professional

(pick your fave)

Of course the stars always look fantastic at the end of the season, but those professionals have bodies to die for: all that gyrating gives them the core strength of a Sequoya.  Take your old sparkly prom dress, remove about 75% of the fabric and show off your chiseled lines.  You better start tanning now, though- that shade of orange is hard to achieve.

Yogi Extraordinaire

The good thing about this one is you get to not only get to be sexy and show off your killer yoga definition, you also get to wear your comfy yoga clothes to that huge Halloween party. Just wear shoes when you go outside.

Madonna

Wear all black, grab a piece of yummy arm candy, about 5 adopted kids and your costume is all ready. Wait, that sounds like Angelina Jolie.  Ok, drop down to about 3% body fat- no wait, that still works. Alright, workout about 3 hours a day, and build your muscles so big they look like they are going to rip through your skin. There we go.

G.I. Jane

Finally, a reason for you to be doing all those pull ups.  Grab an army shirt, roll around in the dirt a bit, get some guy to kick the crap out of you and then shave your head.  Challenge everyone you see to push up contests.

Just because its Fall isn’t any reason to cover up your fit bod.  Rock your muscles this Halloween, you worked hard for them.