Quote form Lesley Garrett's imdb.com entry
http://www.imdb.com/name/nm0308162/bio
"It is vital to keep in shape because opera is about credible casting. If you are playing a fabulous role you have to look fabulous and sometimes you have to wear very skimpy clothing or nothing at all. I've been nude on stage before now and can't afford to have a saggy tush."
So I guess having confirmed that she has been nude on stage we now have to get down to the serious business of tracking down the pictures!