So, Neil Cicerega, famous for Harry Potter Puppet Pals has been making mashup albums for a few years. I'm quite fond of the absurdity.
First we started with Mouth Sounds, which takes place in a universe where songs battle for dominance and All Star by Smash Mouth overpowers everything. Eventually, Rob Thomas and Santana team up with Enya to fight the song off. DON'T NEED NO CREDIT CARD TO RIDE THIS TRAIN.
Next we had a prequel in Mouth Silence. In this universe, All Star never happened.
Now we have the latest project in Mouth Moods. There is a mashup with 500 Miles and Back in Black.