Question about Gone With the Wind song?

In the scene where Ashley Wilkes, Rhett Butler, and Dr. Meade come into Mellie's from their night at the shanty-town, drunk, what song are they singing? The only line I can catch is "All the darkies am a-singing..."

Great film, in my opinion. Looks wonderful in HD, and makes me sorry I didn't watch the DVD at all when I bought it. Thankfully, I found the desire to buy the collector's set at a great price, and sat down to enjoy it. They don't make 'em like this any more...pity.

Thanks for any help -

Kegan