The sister act Chloe x Halle delight in the unexpected on their first mixtape. A sugar-high whirl through gossamer (and, sometimes, dizzyingly brief) tracks that foreground the pair’s bewitching harmonies, The Two of Us revels in stylistic shifts. They sing over a barebones beat on the bravado-filled “Too Much Sauce,” play temptress on the hypnotic “Poppy Flower,” and luxuriate in synth-pop splendor on “Tra Ta Ta.” Using the anything-goes mixtape ideal as a jumping-off point, Chloe x Halle explore R&B's new frontiers.