Do you think this playsuit would look slutty/ too short?

really nice outfit, i say go for it, you will look absolutely stunning, don't worry about the length don't forget the model showing it is 5'10 and a size 8, generally the next sizes up tend to have a slightly longer length, i think it will look lovely with black tights, how about getting some with just a slight pattern to break up the black or you could try ones with diamantes on them this will add sparkle to your fab outfit too, top it off with some great jewellery and a little black clutch bag/ small handbag and you'll have a fab look, and have a wonderful time at your friends 18th.