Mickey Guyton recently joined Metallica at a New York performance for a powerful rendition of ‘Nothing Else Matters’.Guyton joined the band’s headlining set at Global Citizen Festival, which took place at New York City’s Central Park. “Finally a real singer!” James Hetfield remarked on Guyton’s appearance, before the singer belted through the song’s verses and delivered a riveting duet with James Hetfield on the track’s chorus.The country singer previously covered the classic power ballad on the 2021 tribute album ‘The Metallica Blacklist’, which celebrated the 30-year anniversary of Metallica’s classic 1991 self-titled record.