Although Weird Al's word-nerdy song "Word Crimes" came out two years ago, he performed it recently on The Late Show with Stephen Colbert. The performance is joyful, nerdy, and raises the question: How does Weird Al look so young? (He's 56 years old. How'd that happen?)

Word nerds unite! (And note the now-poignant shout-out to Prince around 2:15.)

Trivia note: The official video shown in the background is by Jarrett Heather. Here's what Heather was up to before he made the "Word Crimes" video. (Spoiler: It's a killer Jonathan Coulton video.)

Incidentally, Weird Al is on tour, and his interview with Colbert is delightful. Colbert: "You could be a muppet!" Yes. Yes.