Freddie Mercury and Dolly Parton have the same voice?

Well here's an interesting clip I came across while 'tubin this evening. It turns out that several popular singers are sharing their voices. Matthew Bellamy (from some group called Muse) and Gwen Stefani. Kylie Minogue and George Michael. And even ... Freddie Mercury and Dolly Parton. Scandalously good stuff.