Yellow What?

Maybe I'm just out of it and way behind, but I have been wondering what the deal is with these yellow bracelets that have been making a strong appearance on human wrists around the world, including the wrists of celebrities. What's the deal!? Could these plastic hoops be replacing the ever popular WWJD bracelets? Anyway, I got to the bottom of it all. Check it out: WEAR YELLOW -Live Strong