Look, I'm dancin'!
Written in 1917 by Walter Donaldson and Monty C. Brice, as featured in 1947's A Hare Grows in Manhattan. The song was also used as the title song of a 1950 Warner Bros. musical film: http://www.tcm.com/tcmdb/title.jsp?stid=3808
Speaking of A Hare Grows in Manhattan, did you know that it was originally based on an illustrated feature in the Dec. 1945 issue of Coronet magazine?: http://www.animationarchive.org/2007/08/illustration-coronet-magazine-1945.html