(Photo: Kevin Winter/Getty Images)

Lady Gaga and Metallica’s collaboration at tonight’s Grammys was beset by an awkward technical mishap: As the group launched into “Moth Into The Flame,” James Hetfield’s mic didn’t seem to be working, and his vocals weren’t audible.

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But the group did not follow in Adele’s footsteps and insist on a do-over. The song continued, and Gaga did a stage dive that was a little more low-tech than her high-flying antics at the Super Bowl last weekend. After the number was finished, however, Hetfield appeared visibly frustrated.

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