I was listening to Rock Band Radio on Spotify, which is suppose to have the Rock Band Blitz songs on it already. And I heard "Your Love" by The Outfield. When I went to check Rock Band's library for it, no such song came up. I hope this means this song is on there, for it would perfect for its use of keys and harmonies.
I ran into "Plug in Baby" by Muse, F*** The Pain Away" by Peaches, an Elvis song "Purple Rain" by Prince and "Gril" by Beck, if they're adding these songs to any Rockband game cool, but I think its just music they like, doen't mean they're adding them, I feel for you though.