In a private, dimly lit studio, Shakira accepts the ASS challenge, a dance-off of debauchery that celebrates the art of the booty shake. She warms up, her hips already moving in that hypnotic, natural rhythm. As the music starts, she twerks, her ass clapping like thunder, each cheek a ripe, round planet. She grinds, she drops it low, she works her ass like a sculptor works clay, creating masterpiece after masterpiece of pure, unadulterated ass magic.