I think I've pinned this already, but it's such a good idea!
This will come in handy. How to wear regular bra so the back isn't seen.
backless bra | Splendour Diamante Backless Bra (code:20725)
Forever 21 does have some really cute sport bras and tights
Open Cup Soft Bra | @andwhatelse
Printed Sports Bra, so cute under open back shirts
Styles I Love
Here's the perfect bra for that dress with the deep v front and open back! Fashion Form backless, strapless, plunge bra.
Love the open backs on these cute sports bras! This site has awesome workout clothes!
Active Wear // Sports Bras
Great bra for open back tops! Available at H: http://www.hm.com/us/product/04586?article=04586-B#article=04586-A
playing dress up