Where did the "Mike Shinoda recorded Mike Einziger's guitar from 'Wake Me Up'" thing came from?
I've read a lot of interviews with Mike Shinoda, Avicii, Mike Einziger, and Aloe Blacc about the song and the only thing they mention about Shinoda is that he introduced Aloe Blacc to Avicii.
Edit:
I know if was from some radio, but what I really want to know is: Has any of the people involved in the song ever confirmed this information?