So who or what was the culprit behind Metallica’s troubled performance with Lady Gaga at the Grammy Awards on Sunday night, during which frontman James Hetfield’s mic did not work for most of the song? According to TMZ, sometime between the mic check — which went fine — and the actual performance, a wire under the stage was accidentally unplugged by a stagehand. It was eventually reconnected well into the song. In addition, presenter Laverne Cox apologized on Twitter for failing to introduce Metallica by name during her lead-up to the performance.
— Laverne Cox (@Lavernecox) February 13, 2017