DISCO PURGATORIO: I have finally listened to all of Janelle Monáe's Metropolis: The Chase Suite, and I can tell you what I was pretty sure I'd tell you: You need this. Monáe is an opera-trained lady nerd who's created an amazing pop album centered on the story of an enslaved android who falls for a human, endangering both their lives.

"Many Moons" is still the standout, unstoppable song. You can get a taste of the song, with amazing video, here; the album version is actually better, believe it or not. But "Cybertronic Purgatory" is beautiful and haunting, and in general, Monáe's versatility of style makes this album a unique history of the past fifty years. ("Smile" I like mostly for the quick Elvis "thank yuh" at the end, but that gesture retroactively reshapes the whole song, makes it even sadder and even more obviously an attempt at reclamation of and reconciliation with the American past.)

"Mr. President" is a classic of retrofuturism, as if the 1970s had time-traveled into the Obama administration. I'm not sure it succeeds as a song, rather than a document, but Lord how it made me ache--and ache, also, for Obama himself, who is called upon to be "Moses" and who is generally treated, here, like a Shakespearean king and not an American president.

Anyway, I'm about to order the new album, "Archandroid," about which I've heard nothing but good. "Metropolis" is an amazing reinterpretation of more or less everything I love, Metropolis itself crossed with Invisible Man (the Ellison one) crossed with BET's Gospel programming. Philip K. Dick and Octavia Butler and Q107, Washington's Top 40!... and the black man at Union Station with the saxophone, playing "Leaning on the Everlasting Arms."

"SET THE CONTROLS FOR THE HEART OF THE SUN": Sean Collins's picks for the 15 greatest science-fiction-based pop/rock songs. Awesome. I gave up pop music for Lent (I usually do this) so I will have to play the clips in Eastertide. [EDITED: Oh wait! Sunday is still a feast day! Excelsior.] But you can play them now!

These aren't the songs I would choose, necessarily, but the only really obvious absence (to me) is Janelle Monae. More on her soon.