First recorded by Margaret Whiting (1947).
Other popular versions by The Les Paul Trio (1947), The Orioles (R&B #9 1949), Ella Fitzgerald (1960), Danté & the Evergreens (US #106 1960), Billy Ward & His Dominoes (1965), Nancy Wilson (XMAS #17 1965 |XMAS #24 1967), The Carpenters (1985), Rufus Wainwright (2005), Zooey Dechanel & Joseph Gordon-Levitt (2011).
From the wiki: “‘What Are You Doing New Year’s Eve?’ was written in 1947 by Frank Loesser as an ‘independent song’ — not written for any particular movie or musical. Loesser was an American songwriter who had written lyrics and music for the Broadway hits Guys and Dolls and How To Succeed In Business Without Really Trying, among others. He won separate Tony Awards for both shows, as well as sharing the Pulitzer Prize for Drama for the latter, and was also nominated for five Academy Awards for best song, winning once, for ‘Baby, It’s Cold Outside‘. Among Loesser’s other notable songs: ‘Praise the Lord and Pass the Ammunition’, ‘Heart and Soul‘, ‘On a Slow Boat to China’, and ‘Luck Be a Lady Tonight’.