Somehow I think Carrie will be more nervous than Bo. This should be a great show.
The Fox station in Boston reports that Carrie will sing "Independence Day" (yet, again-- to my great disappointment) and Bo will sing "Vehicle." They will also sing the new AI single and each will sing a new song of their genre/voice (rock for Bo, I guess, and country for Carrie) that was written for them.
The rumor is that part of the reason why Carrie chose "Independence Day" again (in Hollywood, in the Top 10, on the AI: Showstoppers CD, and now the finale) is because she couldn't do "Alone," since the main back-up singer she worked with earlier in the show on that song is sick. I hope this is the reason, because, IMO, choosing this song could single-handedly give this to Bo on a silver platter, which isn't the way Bo should win.