Billboard Music Awards' Most Memorable Looks

The Billboard Music Awards always bring out the biggest names in music, and because it's a spring event, the fashion rules are always a little looser -- which makes for some great red carpet pics.

Before you check out this year's arrivals, let's see some of the most memorable fashions from Billboard Music Awards past!

Remember when Britney Spears dressed like some sort of female pimp, Pink literally looked money, and Jessica Simpson was, well, not pregnant? Maybe her $4 million deal with Weight Watchers will help her look like this again ... just hopefully not in that outfit.

Click on the "Launch Gallery" below to see all the fab fashions:



Be sure to come back tonight for the 2012 red carpet photos of Katy Perry, Carrie Underwood and more!