James Hetfield's oldest daughter Cali joined him on stage at the second annual Acoustic-4-A-Cure concert, but it wasn't to reimagine your favorite Metallica song.
Many Metallica fans were surprised by the sonic overhaul the band gave itself for 1991's self-titled Black Album, but according to the record's producer, Bob Rock, in some ways, the end result only hinted at some surprising influences.