Viva la Vida, on shelves (and your favorite music download service) June 17. Today Activision announced that a dose of Coldplay DLC will hit Guitar Hero III two days later on June 19.
The Coldplay track pack will contain three songs, including "Violet Hill," the first single from Viva la Vida. "Yellow" and "God Put a Smile on Your Face" from the album A Rush of Blood to the Head round out the set. Activision has yet to price the goods, but three-song packs have historically run 500 MS points via Xbox Live and $6.25 on PSN.
[update: Activision sends along confirmation that the Coldplay track pack will, in fact, set you back 500 MS points or $6.25 on XBL and PSN, respectively.]