At the Lingerie America's show in NYC I got a sample of Hollywood Fashion Tape. This stuff is rally great. A lot of models, freelance models, aspiring models will find that fashion tape is great for hiding bra straps at your shoots, and to hold up a strapless dress. Maybe you don't want to wear a bra at all, but fashion tape is an option to keep yourself together and not falling out of your dress during a shoot or at an event.
And there are other products under the Hollywood fashion tape brand you can also consider for little "helpers" during your shoot:
Hollywood No-Shows, Disposable Nipple Concealers
Hollywood Clear Bra Straps
Hollywood Extras - Silicone Breast Enhancers
Hollywood Oil Blotting Sheets