Featuring rarities, live recordings, and a handful of previously unreleased originals, Be OK is a beautifully unfettered compilation that perfectly captures Ingrid Michaelson’s winning qualities. The spare, strummed acoustic guitar that accompanies her wistful “Lady in Spain” and airy cover of “Over the Rainbow,” for example, leaves ample room for the singer/songwriter to let her warm, elastic voice flutter and ascend. There are no bells or whistles needed; the album offers an encounter that’s as easy as it is intimate.