Watch James Hetfield and Daughter Cover Adele's 'Crazy for You'

Sammy Hagar and James Hetfield’s second annual Acoustic-4-A-Cure benefit concert took place Friday night at San Francisco’s the Masonic, and among the surprise collaborations delivering unexpected covers was one performance that no one could have seen coming: The Metallica singer and his 16-year-old daughter Cali Hetfield sharing an acoustic rendition of Adele’s “Crazy…