In the sweet spot between jazz and pop, you'll find Jamie Cullum, the piano-playing British prodigy whose repertoire spans swinging covers of classic crooner tunes, bouncy originals with strong vocal melodies and big-band numbers that should delight even purists. In his world, a percussive reworking of Cole Porter (like 2013's “Love For Sale”) can occupy the same space as an airy acoustic guitar ballad à la Ed Sheeran. Cullum's gift is finding the rhythmic core of each composition and teasing out jazzy cadences that infuse his songs with dynamism, no matter what style he's exploring.