Ariana Grande thinks she'd have "ended up in an insane asylum" if she hadn't done so much preparation for 'Wicked'

She recently told Britain's HELLO! Magazine: "There were so many reasons why I wanted to do this but I wanted to earn it.

"Vocally it's very different to what I usually sing, so I started training every single day with my vocal coach and my acting coach.

"Whatever was asked, I wanted to be able to drop in and really become Glinda.

"I gave my everything to it and paused everything else - I really wanted it.

"I do think, though, if it hadn't happened I might have ended up in an insane asylum. It's a very different experience than anything else, for sure."

The 31-year-old star felt an "immediate safety" when she met co-star Cynthia Erivo, who plays Elphaba, for the first time and their bond helped them both throughout filming.

Recalling their first meeting, she said: "We were at her house. We talked about everything and giggled.

"I felt an immediate safety. And we made a pact to take care of each other.

"I was s******* my pants.

"But she's the warmest human being.

"That promise that we made to each other and how we kept it is one of the things we're proudest of.

"We have a lot of strange, similar, traumas and pains that we've been through.

"I've felt really isolated in mine because they've been somewhat specific.

"But playing a character that made me feel less alone, because they're similar, is something I needed in my life."