Microsoft is definitely and not maybe sure Oasis songs will be downloadable for Rock Band.
Xbox Live blogger Larry "Major Nelson" Hryb confirmed the news, listing the content now available on the US Marketplace.
It was rumoured Oasis tracks would make an appearance last week, after MS accidentally said so on Xbox.com and then tried to pretend nothing happened.
But now available are Don't Look Back in Anger, Live Forever and Wonderwall for 160 Points (GBP 1.36 / EUR 1.86) a pop. Or you can bundle them all together for 440 Points (GBP 3.74 / EUR 5.12).
Rock Band is still scheduled for release in Europe this quarter, although exactly when is still up in the air like someone on a trampoline.