Christopher John Boyle, professionally known as Chris Cornell, is an American rock musician and singer-songwriter, best known as the lead vocalist and rhythm guitarist for Soundgarden and as the former lead vocalist for Audioslave. He is also known for his numerous solo works and soundtrack contributions since 1991, in addition to being the founder and frontman for Temple of the Dog, the one-off tribute band dedicated to his former roommate, Andrew Wood. Cornell is known both for his extensive catalog as a songwriter and for his 4 octave vocal range as well as his powerful vocal belting technique. He has released three solo studio albums, Euphoria Morning, Carry On, Scream, and live album Songbook. Cornell was ranked 4th in the list of "Heavy Metal's All-Time Top 100 Vocalists" by Hit Parader, 9th in the list of 'Best Lead Singers Of All Time' by Rolling Stone, 12th in "MTV's 22 Greatest Voices in Music" and was voted "Rock's Greatest Singer" by readers of Guitar World. He performed the theme song to the James Bond film Casino Royale, "You Know My Name."