The ponytail is a great form, if you have a face that can do it, because it is not Olivia Wilde. You'll want to curl your hair as pony tail is the volume (or you can iron). Make sure you get a haircut in advance if the hair in any blocks of iron are present. Wrap the hair around the ponytail holder, and spritz your hair shine serum to make it look very healthy.
This layout is great and the dress is strapless. And 'nice a halter dress.