Watch: Ex-NIGHTWISH Member MARKO HIETALA Joins DELAIN On Stage In Switzerland

Former NIGHTWISH vocalist/bassist Marko "Marco" Hietala joined DELAIN on stage during an open-air concert this past Saturday (July 8) at Z7 Summer Nights in Pratteln, Switzerland to perform the latter band's song "Your Body Is A Battleground". Fan-filmed video of his appearance can be seen below.

Back in October 2017, DELAIN and Hietala joined forces for the "Danse Macabre" tour. The trek saw DELAIN share the stage with their longtime friend and collaborator who contributed to most of DELAIN's records with guest appearances.

In a recent interview with FaceCulture, DELAIN founder, songwriter and keyboardist Martijn Westerholt spoke about the differences in the singing approach of the band's new frontwoman Diana Leah and that of her predecessor, Charlotte Wessels. He said: "Well, first of all, [Diana's] voice. I like her character. [She has] so much control, so much control… It's also a very friendly voice. And [when I first heard her singing], I could imagine that on DELAIN music. And then I got back the material later, and I was actually astonished and surprised how much it fitted. [Someone said] she has a very similar voice to Charlotte, and partially I totally agree with that; there are some characteristics that are similar. But I also think that people didn't… We have released three singles [with Diana so far], and [people] have not heard her complete capacity in singing. She's very good with soft versus power, [the] contrast [between the two]."

Elaborating on what sets the two vocalists apart, Martijn said: "Charlotte is more rough, which gives Charlotte a lot of character. It's a more rough voice, and that's not a negative thing; no, on the contrary, that gives it a certain quality and character. Diana is more refined. And that makes it different. So I'm totally not saying that, 'Oh, this one is better' or 'That one is better' — no — but it is different. And, of course, indeed, there are also similarities."

DELAIN's first album with Leah, "Dark Waters", arrived on February 10 via Napalm Records.

In addition to Westerholt and Leah, the band's current lineup includes original guitarist Ronald Landa and drummer Sander Zoer, along with bassist Ludovico Cioffi.

The new DELAIN lineup made its official live debut last August at the Riverside festival in Aarburg, Switzerland.

Regarding how she joined the long-running Dutch metal act, Leah previously said: "It's really simple, actually. I knew they were looking for a singer so I just left a comment on their Instagram page. So a couple of days later I received an e-mail from Martijn, and we talked a bit about how I could audition and he sent me some material that I could sing on. And the rest is history."

Asked how she decided to sing in a metal band, the 32-year-old Diana said: "Well, I've always wanted to sing in a metal band. It was really my desire to do it. In fact, I did sing in a couple of rock bands, but it wasn't really heavy music, which I loved at the time. It was really hard to find the right people to form a band with and also to get along together and all that. But I've always wanted to be in a metal band. Always."

Leah also talked a bit about her background, saying: "I was born in Romania, in a city called Alba Iulia. It's in the middle of Transylvania. And then I moved to Italy when I was 15, and I lived in Italy for, I think, 10 years or something. And then I moved to Canada, in Ottawa, and I lived there for five years. And then I came back to Italy. And now I currently live in Italy, near Torino, so up north."