For its Facebook fans, the iTunes Music Store is offering downloads of their Electronic Transmissions Sampler MP3 Album for FREE for a limited time. This 10-track album features music by Teebs, Holy Ghost!, Cut Copy, oOoOO, and more. Deal expires April 15, 2011.

To get discount:

• Like” iTunes on Facebook
• click the “Redeem Now” button to receive a unique coupon code
• Click here to launch iTunes and select the “Redeem” link on the right
• Enter your code to begin downloading the album for FREE