Activity for Fern

So.... My wedding is in August! I'm wearing Spanx under my dress and then I'm gonna change into something else! What shall I go for!? I was thinking of a cute white babydoll? Any recommendations, or shall I go for something sexier? What did you guys...

Any suggestions? Can't seem to find anything online!

My dress is corseted, do I wear Spanx and then change into something nice or wear a thong or go commando!? What do people do!?