The gene responsible for the naked necks appearance is dominant, meaning it only takes one copy of that gene for chicks to have no feathers on their neck. If one of this chick's parents was a naked neck with two copies of the naked neck gene and the other one was any other breed, then all of the chicks those two birds produce would have naked necks. One parent may have been a naked neck, and the other one could be a barred rock, silkie, brahma, orpington, or any other breed. Sometimes silkie mixes can have light colored skin, but more often they have very dark skin (and five toes and feathered legs). So my guess would be that your little bald chick is a naked neck or a naked neck crossed with some breed other than silkie.
So it may not be a showgirl. Which isn't quite what you get when you cross a naked neck with a silkie anyway, at least not the first generation, because the gene that causes silkies to have those soft fluffy feathers is recessive to the normal feathering gene so any time you cross a silkie with a non-silkie feathered bird all of the chicks will have normal looking feathers. Showgirls have no neck feathers and the fluffy silkied feathers of a silkie. The first generation cross of a naked neck and a silkie will give you all normal feathered birds with no neck feathers. If you take those normal feathered birds, which have one copy of the recessive gene for silkied feathers and one gene for naked neck, and breed them together then you will get some chicks with naked necks/normal feathers and some chicks with silkie feathers/feathers on their neck and some chicks with normal feathers that also have feathers on their neck and some chicks that have both the naked neck and the silkied feathers. Of that mix of chicks, the ones with the silkied feathers and naked necks are usually called "showgirls."
