I love that episode so much. Though this version of the song seems a little more upbeat than the one from the episode.
Also, I just posted this in the comments from that link, but wanted to share it here if anyone hadn't ever heard of it:
Here's a little behind-the-scenes story I love telling about this episode. They discuss it on the Justice League Unlimited DVD set, in one of the special features:
In the script, they had a scene written involving Joker. For time and budget reasons, it never made it past the script stage.
It's early in the episode, just after Diana is transformed. Joker, Harley, and a gang of thugs are in a van across the street from a bank. Joker's all, "Okay kids, we're all set. I have some lovely stuff set aside if Bats shows up. I think we're in for a GREAT heist!"
Then Batman walks by on the sidewalk, cradling Wonder Pig, saying softly, "It'll be all right. I'll get to the bottom of this and we'll get you back to normal."
Joker pauses.
"Okay gang, pack it up. We're leaving!"
"But Mr. J!"
"Nope nope nope, we're out! I can't top that!"
