During the 1940s and early 1950s, Waring and His Pennsylvanians produced a string of hits, selling millions of records. A few of his many choral hits include "Sleep", "Battle Hymn of the Republic", "Smoke Gets in Your Eyes", "Button Up Your Overcoat", "White Christmas", "Give Me Your Tired, Your Poor", and "Dancing in the Dark". In 1964 he recorded two albums with Frank Sinatra and Bing Crosby, "America, I Hear You Singing" and "12 Songs of Christmas", for Sinatra's Reprise label.