This is the absolute best thing I have heard in my life. A vocal version of Bonetrousle.

Original source: https://soundcloud.com/anime_sonicmega/papyrus-makes-a-mixtape-final

Lyrics:

ATTENTION MONSTERS, MY NAME IS PAPYRUS
I'M A SKELETON MADE WITH MAGIC, BONES, AND LOTS OF COOL
IF YOU NEED PROOF, THEN LOOK AT MY BICEPS
BECAUSE THEY'RE WEARING SUNGLASSES, AND THAT CLEARLY MEANS I RULE!

MY COOKING SKILL'S UNRIVALED WHEN IT COMES TO SPAGHETTI,
WITH SAUCE AND PASTA NOODLES EXTRA LONG
AND NOT A SINGLE CREATURE HAS SURVIVED A DISH
but frisk just walked right past it
SANS, DON'T INTERRUPT MY SONG!

IT TAKES A SPECIAL KIND OF PERFECTION
JUST TO MATCH WHAT I HAVE BEEN WITHOUT EVER HAVING TRIED
AND THAT'S WHY UNDYNE WANTS ME IN THE ROYAL GUARD-
but aren't you still in training?
- HEY, THAT DOESN'T MEAN I LIED!

SO IF YOU THINK THAT WE CAN BE PALS,
THEN YOU HAD BETTER BE PREPARED FOR IMMENSE AMOUNTS OF FUN!
UNLESS YOU'RE HUMAN, THEN I'M AFRAID YOU'LL BE CAPTURED-
but you kinda made friends with one…

SANS!

Last time I checked, a hundred thousand people or so already heard this, but hey, I think it's still entertaining to hear it again with some visuals. Game: Undertale Sprites belong to Toby Fox Music: Bonetrousle by Toby Fox Voices by Sean Chiplock (https://soundcloud.com/anime_sonicmega/papyrus-makes-a-mixtape-final)