During METALLICA's May 30 concert at Olympiastadion in Berlin, Germany, guitarist Kirk Hammett and bassist Robert Trujillo played a cover of the RAMMSTEIN classic 'Sonne'.

Fan-filmed video of the performance can be seen below.

This unique approach has become a signature element of METALLICA's live shows, where Hammett and Trujillo take turns covering songs from various musical genres and styles, often challenging their own expectations as well as those of their audience.

METALLICA launched the 'M72' world tour in Amsterdam in April 2023 and has since performed for an estimated four million fans worldwide.

As with all tour dates, the band is donating a portion of ticket sales to local charities through METALLICA's All Within My Hands foundation.

Established in 2017, the foundation has raised more than $20 million, supporting vocational and technical education, food insecurity relief and disaster response initiatives.

In a recent interview with AVENGED SEVENFOLD bassist Johnny Christ on his Internet TV show 'Drinks With Johnny', Trujillo discussed how this approach came about: 'We were in Europe — this wasn't the last European tour, but the tour before that.

We were in Amsterdam, and we had tried a couple of...

There was a duet moment, where we were supposed to play a METALLICA song that's maybe, like, a deep cut, so we'd play 'I Disappear' or something, and we started noticing that we weren't getting the result we wanted.

It was, like, we'd go up there and we'd start playing, like, 'Eye Of The Beholder' or something, and then the crowd's expecting James [Hetfield, METALLICA frontman] to come out and sing, and it's, like, 'Man, this ain't working.' They were feeling like it was a prelude moment, and I started thinking, 'We've gotta do something different.' So Kirk came out this one night, and he started playing that song by CHIC ['Le Freak'], and it totally caught me off guard.

And I'm, like, 'Oh, damn.

Okay, I see where he's going.' He's walking out to the front of the snake pit playing this funk jam.

He got me the first night, 'cause I didn't exactly know the bass line, so I improvised it.

And then the second night, I got it,'" Trujillo recalled.

This approach has led METALLICA to discover and pay tribute to a wide range of musical heroes and hidden gems from around the world, often going off-book and surprising both themselves and their audience.

In Paris, they covered Johnny Hallyday's classic 'Houze' on top of their own hits to electrifying effect.

Not every artist has been flattered by METALLICA's unique approach.

Former CELTIC FROST frontman Tom Gabriel Fischer was not impressed with the band's rendition of his group's song 'The Usurper', performed during METALLICA's May 2019 concert in Zurich, Switzerland: 'They butchered it, and it was humiliating,' Fischer told Rolling Stone.

However, this approach has become a distinctive signature element of METALLICA's sound.