What's the name of the Louis Armstrong song w/ him and a trumpet where he says, "when you.... ba ba da bd da..?

I've been trying to find it for years now and I can't. But it's basically "when you.. d daa d daa d..." if you could help... it's him with a trumpet and it's the notes C B A G E C B..... and it's kinda got a lilting tune like a skip..... Thanks :)