DIY "evening dress"

A useful tip for the cost-conscious supermodel.
If you find yourself caught without appropriate evening wear, you can "... turn a pair of jeans into an evening look by cutting off the top four inches to wear as a matching denim bandeau bra top. (To keep the now waistband-less jeans from falling down, she glues the zipper together.)" 

More details at The Guardian.
Here's a tutorial video by Julia Fox herself on how to do this.