Editor's note: Apparently a requirement for membership in Ill Niño is no smiling in photographs! So don't get too happy about their invigorating Latin percussion, chill mix of English and Spanish lyrics and unique brand of metal. Don't let the corners of your mouth start turning up in glee when you see the cool images we've compiled for you of these talented musicians. And don't you dare break out into a grin as you choose your favorite and see how amazing your desktop looks with a sharp new Ill Niño wallpaper. Got it? No smiling!