If you're a Vocaloid fan like myself, you will find yourself stuck on Youtube for hours just browsing through videos. There could be one popular song and others will make versions using the other Vocaloids singing them, as well as duets or even fan karaoke. Just how many songs are there?

Someone over at Nico Nico (you have to have an account there) has put together a video of all the crap ton of songs that can possibly exist. You're not going to find this video on Youtube because it's 91 minutes long. Yes, I'm telling you to sit there for 91 minutes to see how many songs you have heard or know. How many of the 500 songs in that video do you know? I'll be honest, I didn't bother to sit through all of it yet.