The Oklahoma native, 37, passed away on Saturday, November, 26, leaving his new wife, Brenda Flint, grief-stricken and in a state of shock.
She posted a clip from their wedding and captioned it simply: “I don’t understand.”
In another post, she wrote: “We should be going through wedding photos but instead I have to pick out clothes to bury my husband in.
“People aren’t meant to feel this much pain. My heart is gone and I just really need him to come back. I can’t take much more. I need him here.”
Hordes of the crooner’s fans rushed to their social-media comment sections to share condolences and well wishes.
The cause of Flint’s death has not yet been determined.
His long-time publicist Clif Doyal said to The Oklahoman: “He was not only a client, he was a dear friend, and just a super-nice guy.
"As you can see from the outpouring on social media, he was loved by everybody.
"I think a lot of it was just that he was a people person, and he had an amazing sense of humour...
"He was an ambassador for Oklahoma Red Dirt music.”
Brenda Cline, Flint’s business adviser, added: “I have never met a new artist that was so loved and had so many fans. It takes you years to build that and that’s what Jake had."
Tributes also poured in from other country artists, including Blake Lankford, who is part of a songwriter group that counted Flint among its members.
“If there’s a Heaven and they let me in, I know it’ll be because you went to bat for me, Jake,” he wrote.
Singer Travis Kidd said Flint was “a true legend that will never be forgotten”.
Flint made his name due to the success of his debut album, 2016’s I’m Not Okay.
He went on to release three more albums: 2018’s Live and Not OK at Cain’s Ballroom, 2020’s Jake Flint, and 2021’s Live and Socially Distanced at Mercury Lounge.