This would definitely be interesting. Personally, I like the idea of the Doctor visiting a musical planet, but I wonder if any of them have the voice for it (besides Colin, lol).

So far, the one musical Who story I've heard is perfect, the idea of the Doctor telling a story and deciding it'll be a lot more fun if told as a musical.

I'd like to see a Who story told like that, btw, in flashback. Maybe the same story retold 3 times through Eleven, Amy and Rory's eyes, each with a radically different interpretation of what really happened. :)