Miley Cyrus has revealed that Elton John, cellist Yo-Yo Ma and Red Hot Chili Peppers drummer Chad Smith are among the guests set to appear on her upcoming Metallica covers album.“I did a Metallica cover of ‘Nothing Else Matters’ featuring Elton John on piano, I’ve got Yo-Yo Ma, Chad Smith… just so many all-stars in this band”, she tells Capital FM. “I’m so excited about this collaboration”.“Andrew Watt produced it, and I’m really stoked.