Mariah Carey

WATCH: Five Times Artists' In-Ear Monitors Have Failed During a Performance

Adele’s GRAMMY set certainly wasn’t the first time that a superstar has had an issue with their in-ear monitor during a live performance. In fact, Adele wasn’t even the only performer to have an audio issue during Sunday’s GRAMMYs. Remember when we couldn't hear Metallica singer James Hetfield for...
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