Hawaii Wedding Dresses

Should I wear a bustier for my wedding?
I am getting married in October in Hawaii and I picked out my wedding dress but have not decided if I should wear a bustier underneath my dress. My dress is the informal kind, for destination wedding, soft A line, chiffon, with sweatheart neckline, I am debating if I should wear a bustier or just a strapless bra. I tried it with bustier, it holds up very well and I don’t need to worry about the dress slip down due to my small chest….but it’s going to be hot in Hawaii and I want something light and comfortable. I thought strapless push up bra will be good too….but not sure if I should do bustier or just strapless bra…..I want to look my best and not to worry fix my dress or bra all day.
Please help!!!
Pick whichever one is more comfortable for you. It is your special day and you don’t want to be stuck worrying about a wardrobe malfunction.
If you think a strapless will be falling down the entire time, get a bustier.