http://popup.lala.com/popup/1009087813059503126

Try this link but if it doesn't work, go to Google and type in Good night sweetheart, sleep will banish sorrow.

The first result should be the song sung by Bing Crosby and you can click on the play button to hear it right there!!!

There also appear to be a few results on youtube, but I can't play them here at work!!