This is a Weird Al original. And being a Disney-phile, I loved it. I don't really see it as being irreverent to the Disney experience as much as it is a friendly elbow jab to a beloved cousin - we all know it's true, so let's have a good chuckle over it.
Now, this last one is definitely my favorite from the album. I've posted the song here in the past but not the video. You can google the controversy surrounding this parody, "Perform This Way," from Lady Gaga's "Born This Way." I won't go into it here, but I think it's safe to say the parody is superior to the original. And yes, the accompanying video is creepy and disturbing. But, considering the subject matter and the original song's own video, it wouldn't be a worthwhile parody if it wasn't creepy and disturbing.