When Fred and Ginger paired for nine song-and-dance films in the 30s, the top pop composers of the day (which means, pretty much, the best of all time) lined up to provide them with great tunes. This two-CD set contains irrefutable evidence that Irving Berlin, Jerome Kern, Cole Porter and the Gershwins did some of their most lingering work for Ginger and Fred. It contains all 30 numbers from their RKO couplings, plus four from Fred’s solo effort A Damsel in Distress and the Arlen-Mercer “One for My Baby” from The Sky’s the Limit. Need more convincing? Here’s just a taste of the playlist: “Night and Day,” “Cheek to Cheek,” “The Way You Look Tonight,” “Nick Work If You Can Get It,” “They All Laughed,” “Let’s Call the Whole Thing Off,” “They Can’t Take That Away from Me.” Case closed.