The North American Hallowe'en Prevention Initiative presents Do They Know It's Hallowe'en?, available today:

BOO! This fall’s sweetest – and scariest – benefit song is Do They Know It's Hallowe'en?. This single features a star-studded ensemble known as the North American Hallowe'en Prevention Initiative. Both a trick and a treat, this song is a satire - as well as a charity-benefit song with all proceeds being donated to UNICEF.

An epic journey into the pulsating heart of fear, this song is a call-to-arms featuring:
Beck
Sum 41
The Arcade Fire
Sonic Youth
Yeah Yeah Yeahs
Sloan
Peaches
Feist
Devendra Banhart
Wolf Parade
Postal Service
Buck 65
Comedian David Cross
Sex Pistols’ founder Malcolm McLaren
Elvira, Mistress of the Dark
60s soul legend Gino Washington
Psychedelic singer Roky Erickson
Los Angeles 70s group Sparks
Inuit throat singer, Tagaq (a frequent collaborator with Björk)
AND MANY MORE!