2 of my friends teamed up for their birthday party, this was a while ago, and decided on a sexual fantasies theme. Us being a rather special group, we chose costumes such as sexy batman (female), pool boy, sexy darth vadar (female), life guard, and a few clever in joke costumes. 3 of us dressed up as characters from the Rocky Horror Picture show, we had Rocky, Frank N Furter, and I, Magenta.
My costume was made out of a black dress, and white men's shirt, both from an op shop. I cut the dress down the middle, added buttons and loops, and used the cuffs and collar from the mens shirt. The apron and maids cap were made from the material of the mens shirt, i thought the apron would be quite see-through but it didnt show the gaps between buttons at all (i really should have used more). I didnt use any patterns, just the awesome advice and pictures from here,
http://www.rockyhorrorcostumelist.info/.
Dress (sorry its blurry, but you get the idea)

Maids cap. The lace trim is just some cafe curtains from my stash, cut up

Apron. The shoulder straps aren't meant to be connected, but tied in with the waist straps. This was just easier for me to do up

Me on the night

And all 3 of us

Rocky was meant to be fully blonde on the night, but it didnt end up happening. I also made his shorts, just sewed gold spandex onto a pair of his underwear (that was an interesting experience). And yes Frank is a female