As anyone who's tried to soothe a restless soul to sleep knows, finding the perfect lullaby can be an elusive quest. A balance is needed between hypnotic repetition and dreamy inspiration, between murmured lyrics and reassuring melodies, offset by a beautifully soft instrumental backdrop. The tracks here range from cinematic orchestrations to hushed nursery rhymes, classical reveries to classic folk ditties, pop singers' delicate originals to acoustic versions of familiar ballads. What they have in common is an essential sweetness and the magical ability to be played over and over without getting old.