I had not realized that Patty had still been alive:
Last Andrews Sister, Patty, dies at 94 - CNN.com
The article mentions their appearance in the movie "Road to Rio", one of Bing Crosby's and Bob Hope's 'road shows', and my personal favorite. If you haven't watch it. The Andrew Sisters were simply a joy to watch and listen to.
They were one of the most hard working, and popular acts, of the USO tours during WWII.