I recently met a celebrity stylist called Ceril Campbell at a lingerie event who has styled loads of celebrities for red carpet events and even styled Patricia Field (costume designer of sex and the city) and she was just brilliant. her job is to help women look their best, no matter what shape they are, and advises on the kind of underwear women of different sizes should wear. i think she's pretty expensive to hire as an image consultant but i know that there are lots of great tips on her website:
www.redcarpetundies.com as well as some nice underwear and lingerie accessories.
i hope this helps...she made me feel so positive about myself when i met her and that's got to be a good thing....