Robin Schulz shows off his melodic house chops on Prayer, a collection of his sweetly lilting singles and remixes. On both originals like "Warm Minds" and remixes for the likes of Clean Bandit and Coldplay, the German producer fleshes out gently pumping grooves with delicate guitar and piano melodies that dissolve like sugar on the tongue. The magic lies in the contrast between airy melancholy and crisp, driving beats. Jaunty sax riffs enliven the bittersweet "Sun Goes Down," and chiming keyboards add sparkle to Lykke Li's wearily defiant "No Rest for the Wicked."