![L-R) Musicians Robert Trujillo and Kirk Hammett of Metallica, singer Lady Gaga and James Hetfield and Lars Ulrich of Metallica arrive for the 59th annual Grammy Awards held at Staples Center in L-R) Musicians Robert Trujillo and Kirk Hammett of Metallica, singer Lady Gaga and James Hetfield and Lars Ulrich of Metallica arrive for the 59th annual Grammy Awards held at Staples Center in](https://c8.alamy.com/comp/TY6WFX/l-r-musicians-robert-trujillo-and-kirk-hammett-of-metallica-singer-lady-gaga-and-james-hetfield-and-lars-ulrich-of-metallica-arrive-for-the-59th-annual-grammy-awards-held-at-staples-center-in-los-angeles-on-february-12-2017-photo-by-jim-ruymenupi-TY6WFX.jpg)
L-R) Musicians Robert Trujillo and Kirk Hammett of Metallica, singer Lady Gaga and James Hetfield and Lars Ulrich of Metallica arrive for the 59th annual Grammy Awards held at Staples Center in
![Metallica reveals how they decided on Lady Gaga duet for Grammy Awards 2017: 'She said 'yes,' took about 12 seconds' - ABC News Metallica reveals how they decided on Lady Gaga duet for Grammy Awards 2017: 'She said 'yes,' took about 12 seconds' - ABC News](https://s.abcnews.com/images/Entertainment/GTY-grammy-metallica-lady-gaga-jef-170213_16x9_1600.jpg)
Metallica reveals how they decided on Lady Gaga duet for Grammy Awards 2017: 'She said 'yes,' took about 12 seconds' - ABC News
![Lady Gaga on Twitter: "See you at the Grammys. 🤘#MetalliGa @Metallica 🦋🔥 https://t.co/asIALPRrPC" / Twitter Lady Gaga on Twitter: "See you at the Grammys. 🤘#MetalliGa @Metallica 🦋🔥 https://t.co/asIALPRrPC" / Twitter](https://pbs.twimg.com/media/C4cV9mQUEAA8-Ef.jpg)
Lady Gaga on Twitter: "See you at the Grammys. 🤘#MetalliGa @Metallica 🦋🔥 https://t.co/asIALPRrPC" / Twitter
![Metallica reveals how they decided on Lady Gaga duet for Grammy Awards 2017: 'She said 'yes,' took about 12 seconds' - ABC News Metallica reveals how they decided on Lady Gaga duet for Grammy Awards 2017: 'She said 'yes,' took about 12 seconds' - ABC News](https://s.abcnews.com/images/Entertainment/GTY-grammy-metallica-lady-gaga-jef-170213_4x5_992.jpg)
Metallica reveals how they decided on Lady Gaga duet for Grammy Awards 2017: 'She said 'yes,' took about 12 seconds' - ABC News
![Lady Gaga and Metallica's duet falters at the Grammys 2017 as mic fails...while Adele restarts her George Michael tribute | The Sun Lady Gaga and Metallica's duet falters at the Grammys 2017 as mic fails...while Adele restarts her George Michael tribute | The Sun](https://www.thesun.co.uk/wp-content/uploads/2017/02/nintchdbpict000301350523.jpg)