Sometimes you need to get a new bra. Usually this happens when you know that you just bought new clothes and you do not have a bra that comes with them. It is relatively common with clothes bought for a special occasion.
For a dress that no shoulder belt you will probably be a good quality strapless bra. You do not want to make your laundry, it is important that you first go and buy your clothes and then the decision for the BH. It is a good idea to go shopping while wearing your clothes, so that when you try bra you will immediately see if it suits you and not from under the clothes. This kind of clothes that do not have an open back and straps are usually the easiest way to find bras with.
There are also Backless dresses, usually over a halterneck strap or even a kind of shoulder belt that only naked from the back. From these you can try a Backless bra, providing you with the support, but not about the band is around the back. It might be difficult to create a model that is perfectly matched to your clothes, because the straps are usually in very thin clothes and make it difficult to ensure the bra-makers. If you are serious about getting the Backless bra you should do once your clothes while shopping. These types of bras can not be purchased online, since you have to try it on, to ensure that they are consistent with your dress.
Instead of Backless bras, I would recommend for a
Backless and strapless model are either glued or on your breasts have a silicone cup that is a vacuum, which attach to your breasts. It might take a while if the cups properly, but they will support you and bring your breasts together, to overcome the divisions. With a low-cut dress you will not appear on any bra, as they usually half cup, and only for the lower part of the breasts and nipples.
With a bra like this you can use any kind of clothes, but you have to remember that the support they offer is not comparable with the support of a normal bra. So you must have a very solid pair of breasts to them with something.