Lady Gaga was on lithium while filming A Star Is Born.
The 39-year-old actress starred alongside Bradley Cooper in the 2018 musical romantic drama film, and Gaga has now confessed to experiencing a psychotic break during the shoot.
The chart-topping singer - who cancelled the Joanne world tour after filming wrapped - told Rolling Stone: "There was one day that my sister said to me, ‘I don’t see my sister anymore.' And I cancelled the tour.
"There was one day I went to the hospital for psychiatric care. I needed to take a break. I couldn’t do anything … I completely crashed. It was really scary. There was a time where I didn’t think I could get better … I feel really lucky to be alive. I know that might sound dramatic, but we know how this can go."
By contrast, Gaga is now a "healthy, whole person" having found love with Michael Polansky.
Gaga admits that her fiance has transformed her entire life.
The pop star - who began dating Michael in 2020 - shared: "Being in love with someone that cares about the real me made a very big difference."
Meanwhile, Gaga previously admitted that she found it "really hard" to cope with stardom.
The singer signed with Interscope Records back in 2007 and she quickly became one of the most talked-about artists in the world - but Gaga has ultimately found a stable, healthy influence in Michael.
The Poker Face hitmaker told Extra: "In any room, he just holds me so high, and I’m sure that people don’t, like, all know this, but being the only woman in the room most of the time since I was a teenager was really hard. And so I have a deep love for my fiance because he just, he, like, holds me in a sacred space."
Gaga actually worked with Michael on Mayhem, her most-recent album, and Gaga admitted that he's her "partner in every way".
The New York-born star said: "He’s a part of everything I do because he also makes me a part of everything that he does, and I just have to say, like, as a woman in music and in business, I have a lot of respect for men that uphold women."