Everything to know about Hugh Hefner's 31-year-old widow, Crystal Hefner

Crystal announced in an emotional Instagram post that has since been deleted that she was diagnosed with the disease, advocating for others to get tested. 

"It is a disease so many people are living with and is becoming an epidemic. I always thought I was a hypochondriac. Doctors told me it was just 'stress' or 'all in my head' but I finally figured it out and you can too," Crystal said, in her now-deleted post.

In 2016, the model and singer started a travel blog. She only ever wrote 16 posts, between August and October of 2016 — with three posts dedicated to the Playboy mansion.

Hugh's voice is featured in Crystal's song "Pick Up the Lines."

The model has not released any new music since.

Crystal released the singles "Call the Cops" and "True Harmony," the year after she married Hugh.

Nearly a year after the couple had initially planned on getting married, Hugh and Crystal wed in the Playboy mansion on New Year's Eve in 2012.

"Last time it turned into a big ordeal and then it all fell apart," Crystal told US Weekly, "This time around is amazing. Our relationship is better than it ever has been before. I'm very happy and Hef's very happy and we're excited."

Less than a month after the wedding had been called off, Crystal landed the cover of Playboy, indicating that the two had possibly mended their relationship. 

Th couple were supposed to get married in June 2011, but Hugh tweeted that Crystal had a change of heart.

The 24 year old told Ryan Seacrest in a radio interview that she didn't think getting married "was the right thing" for her, and that calling off the wedding was a "mutual" decision between her and Hugh.

Although, Hugh's tweet seemed to indicate it was the decision to call off the wedding was Crystal's idea.

 Right before Crystal put the kibosh on her wedding with Hugh, she released this single.

Crystal was 24, and Hugh was 84 at the time of their engagement. Hugh announced their engagement in an ecstatic tweet.

The model's engagement ring reportedly cost the media mogul $90,000, according to the Daily News.

Hefner was still dating Kristina Shannon and Crystal Shannon (known as the Shannon twins) when he and Crystal first began dating in 2009.

The Shannon twins were Hugh's girlfriends and stars of his popular reality television series, "The Girls Next Door." Crystal joined the reality show, alongside the Shannon twins for its last season.

Soon after the series ended, Crystal became Hugh's main girlfriend, and the Shannon twins were no longer a part of the picture.

The pair began dating in 2009, the same year Crystal appeared in Playboy as December's Playmate of the Month.

Crystal was 22 and Hugh was 82 when they started dating.

Crystal was born Crystal Harris, April 29, 1986, in Lake Havasu, Arizona.

While Crystal is a US citizen, her parents are from Britain. Crystal ended up living in Britain after she was born until she was five, when her family moved back to the US, settling down in San Diego, California.

Crystal attended San Diego State University for college, majoring in psychology.