The last time we see Kaylee on Serenity, she's just in the background, but it's still fun Kaylee.
More after the break...
Above is a screencap.
The costume was at the Propstore for awhile:
It looks like she might be wearing some boots, but I'm not sure what kind.
My Photobucket Album for Kaylee.
Serenifly Costumes site for Kaylee.