Check out Lady Gaga's rehearsal with Metallica before the Grammys!

Lady Gaga performed with Metallica at the Grammys, and as we all now know, there were some mic issues with the performance! James Hetfield's mic wasnt working, so he had to double up with Lady Gaga on her mic. It was very hard to hear him during the performance, and he was so angry with the technical issues that he threw a guitar and kicked a mic stand! Well now the rehearsal footage is out, and it SHOULD have been a flawless performance- check it out:

 
Mary Kennedy

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