According to votes on Youtube, Jessica black's "Friday" is the worst song ever :
The song was not written by Black, but by Ark Music founder Patrice Wilson, who also appears as the rapper on the song and video.
I enjoyed a few parodies of it, like this dub, or the song "Saturday".
But wait, there's more ! Here's a re-imaging of the song, with religious overtones !
This song is now in your head.