I finally got a chance to see the Weird Al episode.
Now, if there was one thing I wasn't expecting, it was that the Goof Off was going to be done in the exact style of those great Weird Al Polka medleys.
Now, I've seen the appearance where they reference him parodying songs written by the characters (Sabrina the Animated series and The Simpsons), references to his own songs ("I am Wreck-Gar! I DARE to be Stupid!") but this really takes a true Weird Al fan to reference his iconic Polka schtick. Even with the polka vamp bridges from one song to the next. Somepony did their research on that one. And Derpy was in like every other shot. So you know they were writing this with the not little girls that watch the show in mind.
And...eh... also... Ponies are the next girl based Happy Meal after Peabody and Sherman (I usually check to see what the next one is, since I collect kid's meal premiums). They have that DJ Pony in there. Might as well add that.