Ends 12/23. At Amazon, get one of 25 select MP3 albums for $1.99 downloaded
when you sync your Amazon and Twitter accounts and retweet the offer. You don't actually have to write a tweet, just click "Get credit" and it will happen automatically. Albums are normally $9 and $10 each and include Lana Del Rey, U2, Nirvana, 2Pac and John Travolta's hilarious new Christmas album.