Willow Smith has changed since her platinum debut single "Whip My Hair." Her latest proof is her debut album Ardipithecus, which she surprise-released today on US iTunes. "Classification and organization are ruining the minds of a generation," she sings to begin, before she proceeds to resist easy hooks, if not reject traditional song structures altogether. Such idiosyncratic tendencies, along with her raw vocals, has Willow sounding like Sia before she became a fail-safe songwriter for pop superstars like Rihanna. Listen below.