Fiona Apple, Miley Cyrus, Miguel, Josh Homme, Brandi Carlile, and Chris Stapleton have joined the lineup for the upcoming Chris Cornell tribute/benefit concert I Am The Highway: A Tribute To Chris Cornell, Pitchfork reports. Foo Fighters, Metallica, Ryan Adams, and the remaining members of Soundgarden, Temple Of The Dog, and Audioslave were previously announced as…