I adored this. I read it. I recced it. I read it again!
It's better than the movie, with this crazy cast of familiar characters, carrying on in full operatic fashion! I love the OC's, especially the priestess, but even more I love Lucius, and voyeuristic Albus, and the two of them singing "Watch him mince, he is the Half-Blood Prince! while poor Severus frantically says, Finite Incantatem! ROFL.
Also, Eileen and her reluctant audience, always trying to shush her ... PURE WIN.
I had opened a Youtube of every song as I came to it so I could enjoy it more. I don't know if you were going to add a playlist, so I pasted my own list of the 15 songs (that I identified - do tell me if I messed it up!) with links to Youtube vids of them, here at my IJ.
I enjoy this fic more each time I listen to the songs - or sing along with the Mincing Queen. Lucius was such an inspired pick for this role. I'm seeing him in satin and sequins at Eurovision, singing into a silvery snake-headed microphone. Harry at the keyboard, Snape singing a snarky harmony while dancing with his guitar, Eileen on drums, all backed by a chorus line of Albus, Remus, and Shacklebolt. (Talk about an eyeful.)