This is hilarious. This is Steve Martin and the Steep Canyon Rangers. They've been together for quite a few years now. If you haven't seen them before, you should search through YouTube for some of their songs. They're not only funny but are very good musicians too.
Here they are doing Orange Blossom Special with a bit of King Tut at the end.
And here there are with another tune featuring their amazing fiddle player, Nicky Sanders, playing Auden's Train.