Django Unchained (Quentin Tarantino, 2012)

What parallels or similarities do you see between the film Django Unchained and spaghetti westerns - particularly in terms of actors, plots, music, and atmosphere, as well as the film set and props?

We have the questionable use of SW-Songs (Titoli, His name was king). Unfortunately the songs lyrics refer explicitly to the flicks they were made for. In that case, it makes not really sense to put them in. For generate some kind of SW-mood only, I guess.