Ten million 25-song iiTunes samplers are being given away free in the US under a new promotion.

Apple is working with social-networking service, Facebook, to offer the new back-to-school promotion. Launched in February 2004, Facebook's site has registered over 8.3 million people.

Facebook will give away one million 25-song music samplers from iTunes each week for the next ten weeks. Each iTunes music sampler will feature selected songs from a different genre, ranging from Alternative to Rock, Hip Hop to Dance, and Electronica.

"iTunes is the most popular digital music service in the world and we are excited to offer this exclusive giveaway," said Owen Van Natta, chief operating officer at Facebook. "We're always striving to provide people with the things they care most about, and with over half a million bands listed on Facebook we know that listening to and downloading music is an integral part of our users' lives."

"We're thrilled to work with Facebook on this great promotion," said Eddy Cue, Apple's vice president of iTunes. "This is a tremendous opportunity for people to legally discover and enjoy music on the iTunes Music Store through their favourite social directory."

Facebook users also have access to an Apple education discount year-round through its popular sponsored group on Facebook. As part of Apple's back-to-school promotion, Facebook users can receive a free iPod nano with the purchase of a MacBook, MacBook Pro, iMac or Power Mac G5.