Josef Myrow composed this buoyant, swing-ready standard in 1946 with lyrics by Mack Gordon for the 20th Century Fox musical film Three Little Girls in Blue. In the film it served as a lively production number, performed on screen by Vera-Ellen and Charles Smith, though their vocals were dubbed by Carol Stewart and Del Porter, reflecting the era's common practice of pairing dancers with off-screen singers. Myrow, born in Smolensk under Tsarist Russia, and Gordon, born in Warsaw, were both immigrants whose collaborative work contributed to the Great American Songbook alongside Myrow's other compositions such as Autumn Nocturne. The song's playful melody builds momentum through its verse-chorus structure, with the A section extending and developing toward a climax that conveys infectious youthful energy. While it originated as a film number, the song took on a second life through Frank Sinatra's landmark 1956 recording on Songs for Swingin' Lovers! for Capitol Records, which transformed it into a swinging big-band showcase and a concert staple he returned to throughout his career, including live versions at the Sands and the Meadowlands. Sinatra later revisited it as a duet with Charles Aznavour on the 1993 album Duets. The song has attracted interpretations from Ella Fitzgerald, Helen Reddy, and Michael Buble, spanning jazz vocal and pop styles. Its appearance in the 2003 film Elf introduced it to yet another generation of listeners, cementing its place as a durable feel-good standard.