(Cover) - EN Showbiz - Claudia Schiffer used to have her underwear stolen by crazed fans at the height of her career.

The German supermodel is famous for being one of an elite group of models who worked during the 1990s. She counts Helena Christensen, Cindy Crawford and Naomi Campbell as friends, and says the experience of becoming so well known during that time helped them bond.

Its great to be part of a group with Helena, Cindy, Christy [Turlington], Naomi, Linda [Evangelista], Stephanie [Seymour] and Eva [Herzigova], she explained. At the fashion shows during the 1990s, it was completely crazy. People would steal our underwear and photograph us through a hole in the tent. We all grew together and formed friendships, and weve had a lot of adventures over the years, even though we were all aware there was a healthy sense of competition.

Claudia says keeping fit is a vital part of her job. She admits she works hard to say slim, explaining if she doesnt she wont fit in the clothes she has to model.

A good diet is also vital, as it keeps Claudias energy levels high. As for sleep, over the years Ive learnt to nap on planes and to grab the chance whenever I can, she told British newspaper The Times. (C) Cover Media