User blog comment:Green Ninja/GN Thoughts: How does Cadence know so many weirdos?/@comment-7639623-20140320005326

If you think about it, it's actually simple logic.

The human world is in another dimension then ours. Every time something occurs, and that means ANYTHING, another dimension appears in which the exact opposite happens.

Therefore, there is no telling how many different dimensional possibilities there could be, so it makes perfect sense that we could have Shake It Up in our dimension, albeit with penguins in the place of humans. The same goes for Teen Beach Movie.

For Star Wars, it should be noted that the Star Wars characters came from another "galaxy" including Darth Herbert. This could only mean that this is Herbert from anther dimension, one that has characters similar to Star Wars characters, but again, are penguins rather than humans.

As for The Muppets, it is implied that The Muppet Show in our world is exactly the same as it is in the human world, only without humans in it (and possibly penguins in their place, but we have yet to figure that out).

When you break it down, it's not so impossible after all.