"There's probably like an album's worth of great Audioslave songs that were not released," said Morello when asked about the unreleased material. "When bands are deciding what songs go on their records and what don't, it's not always sensible. It's not like here's the 10 best jams. Sometimes it's like, someone likes this one, someone's not feeling that one. So, we had from each of the three Audioslave records, we had songs left over, some of which are really great."
The 'Back to the Beginning' concert featuring Black Sabbath and Ozzy Osbourne raised nearly $200 million to be split among three charities, showcasing the power of music in philanthropy.