《20th Century Masters - The Millennium Collection: The Best of Donny & Marie Osmond》 collects a dozen of the brother and sister duo's best-known and definitive performances, including "Leaving It All Up to You," "It Takes Two," "Deep Purple," and "Paper Roses." Though some of the songs the duo tackles venture into rock and disco influences, for the most part their work stayed in the '70s AM pop style that Donny's teenage solo career began with, and is epitomized by songs like "One of These Days" and their version of "Let It Be." Though their sound never quite hit the transcendent highs of the Carpenters' work, at its best Donny & Marie's output had a smooth, airy agreeable quality that has made it date surprisingly well. Not many Osmond retrospectives focus just on Donny & Marie's work, so 20th Century Masters - The Millennium Collection: The Best of Donny & Marie Osmond fills that gap competently.