What to wear to try on

hello ladies,
my dress came in and i'm going to try it on for the fist time tomorrow. I was thinking of maybe wearing my spanx there since i plan on wearing them under the dress on the day of. I don't have my longline bra yet, but was thinking of wearing that as well on the day of (dress is strapless) and for tomorrow just wearing a strapless bra. Any reason why I shouldn't wear the spanx? I'm getting my alterations done somehwere else, not there, so no measuring/altering will be done.

thanks!

If you have it, bring it.

i had nothing and they gave me a srrapless bra with a long shaper part to wear.