Quote from Lesley's bio page at IMBd (
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 aford to have a saggy tush."