If it hadn't already been mentioned, in previous threads, Leeloo's suspenders in the movie were cast latex pieces. A lot of the costume parts in the movie were made out of latex for a futuristic feel. But you can do them out of other methods, including fabric, if that's not a viable method for you (even with a tutorial).
Decide how you're going to do them first, then it may not be so scary when you go to actually start.
Founder and Vice-President, Madison Area Costuming Society, a chapter of the International Costumer's Guild
Strange Land Costuming - www.strangelandcostumes.com