This only works for people who is going to buy Guitar Hero 3 bundle and Halo 3, if not you are sol and please move along.
1st
Go to www.bestbuy.com/halo10
Add Either Halo and the $10 gift card.
2nd
Add a 1600 Xbl Points
3rd
Go here
Add Guitar Hero III for 360 and Leather Guitar Strap.
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