Sia's charm lies in her ability to be quirky, serene, sad and sanguine all at once. On Some People..., she embraces these qualities with a brute ferocity, layering on harmonies underpinned by heavy piano, brass and strings; singing rhymes about love, math and cocaine; and carrying her croons from a soulful coyness to a Christina Aguilera-like vibrato showiness in one beat. Her vocals are supreme and her guests quite hip (Beck, actor Giovanni Ribisi), but it's Sia's softer, humbler tracks that stand out here, including "You Have Been Loved" and the Ray Davies cover "I Go to Sleep."