Mariah Carey has finally decided to come forward about the mental illness she’s been suffering from for years.

The legendary singer told People this week that she was diagnosed with bipolar II disorder in 2001 and has been in “constant fear” of being exposed, but is now hopeful that the stigma can finally be lifted soon.

“Until recently I lived in denial and isolation and in constant fear someone would expose me,” she told the mag. “It was too heavy a burden to carry and I simply couldn’t do that anymore. I sought and received treatment, I put positive people around me and I got back to doing what I love writing songs and making music.”

The Long Island native said she only recently started to receive treatment after a difficult few years.

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On New Year’s Eve 2017, Carey famously failed on live television and was faced with countless backlash.

The disastrous performance followed the well-known diva’s split from fianc James Packer just two months prior. Her Las Vegas residency, which was just coming to an end at the time, and her volatile relationship were all documented on her reality series “Mariah’s World.”

“Mariah’s World” aired from Dec. 4, 2016 to Jan. 29, 2017.

Bipolar II disorder has symptoms of periods of depression and hypomania which includes a persistent elevated or irritable moods, as well as sleeplessness.

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Bipolar I sufferers have full manic episodes, whereas II suffers only experience hypomania for a short period of time.

Carey, 48, told People that she initially thought she had a sever sleep disorder because of her non-stop working.

“I was working and working and working I was irritable and in constant fear of letting people down. It turns out that I was experiencing a form of mania. Eventually I would just hit a wall. I guess my depressive episodes were characterized by having very low energy. I would feel so lonely and sad – even guilty that I wasn’t doing what I needed to be doing for my career.”

The “Hero” singer now tells the mag that she’s in a good place and that’s why she felt it was the time to come forward.

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“I’m comfortable discussing my struggles with bipolar II disorder,” she said. “I’m hopeful we can get to a place where the stigma is lifted from people going through anything alone. It can be incredibly isolating. It does not have to define you and I refuse to allow it to define me or control me.”

The five-time Grammy winner, who is referred to as the “songbird supreme” by Guinness World Records, exhibits an impressive five-octave vocal range.

She is perhaps best-known for her holiday hit, “All I want for Christmas Is You,” but she also has personal hits like “We Belong Together,” “Heartbreaker” and “Always be My Baby.”

Her debut album, “Mariah Carey,” was released in 1990 and put her on the map as the only artist to have their first five singles land on the Billboard Hot 100. After her self-titled album, she released three consecutive albums:Music Box (1993), Merry Christmas (1994), and Daydream (1995). She continued to put out albums after that, including her most recent, “Me: I Am Mariah… The Elusive Chanteuse” in 2014.

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Throughout her career, she’s sold more than 200 million records worldwide and the third best-selling female artist in the U.S., according to RIAA.

Carey shares 6-year-old twins Monroe and Moroccan with ex-husband Nick Cannon, whom she was married to from 2008 to 2016.

She was previously married to Sony Music head Tommy Mottola from 1993 to 1998 and has been most recently linked to her backup dancer, Bryan Tanaka.