Best Buy and Interscope Records teamed up just after the Christmas holiday to offer music fans buying select CDs a copy of the TweetDeck iPhone app.

TweetDeck is a free app that lets users post and review Twitter and Facebook updates from their iPhone. Through the promotion, fans can download a custom version of the app to their iPhone pre-set for them to follow the Twitter feeds of the 16 artists participating in the promotion. Artists include 50-Cent, Black Eyed Peas, Flyleaf, Timbaland, Wolfmother, Lady Gaga and others.