The challenge is to listen to the song on full blast for 7 hours straight. You don't win anything other than the possible immunity to the song.
I'm not sure where the challenge originates from, but I've seen some people who have acheived the 7 hour mark, and some who had multiple windows of it opened.
Good lord, that's madness! Seriously, that's enough to drive someone to alcoholism.
By the way, I'm happy because I saw that video of Kelsey Grammar (or however you spell his name) fall down, and it sounds like he said "Oh, Glorb", which is pretty sweet. Furthermore, I looked up "Glorb" on Google, and it says there's a lantern called Brunton Glorb, and a song called "Glorb the Magnificent". Now that I have lanterns, songs of my magnificence, and that guy who played that guy on
Cheers on my side, my evil empire will spread throughout the galaxy.