We were just sent word, that Harmonix has a special gift ready for Christmas Day. Read below for all the info.

Harmonix and MTV Games want you to ring in the holiday cheer with a
special Rock Band gift. For a limited time, fans and
gamers can purchase tracks from platinum-plus-selling rock act 30
Seconds To Mars, pop-punkers All-American Rejects and Swedish new-wavers
The Sounds at a special holiday price of $0.99 per song (80 Microsoft
Points per track for Xbox 360).

Starting tomorrow, there will be a total of five new songs available.
They are:

"Attack" - 30 Seconds To Mars (from 2005’s A Beautiful Lie)
"The Kill" - 30 Seconds To Mars (from 2005’s A Beautiful Lie)
"Dirty Little Secret" - All-American Rejects (from 2005’s Move Along)
"Move Along" - All-American Rejects (from 2005’s Move Along)
"Song With A Mission" - The Sounds (from 2006’s Dying To Say This To
You)