The singer announced his shock divorce from Lambert in July, 2015, after nearly four years as husband and wife, and he channelled his heartbreak for his latest album, If I'm Honest.

Now, in a candid new interview with Billboard magazine, Blake, 40, reveals he ordered the tracklist to reflect a "very specific time frame" in his life, during which his marriage crumbled.

He claims the opening song, party tune Straight Out of Cold Beer, represents the carefree mind-set he had at the beginning of 2015, before he realised his romance was doomed in the spring.

"That's when it became painfully obvious that it wasn't going to work out in my ­marriage," he explained.

Blake does not go into specific details, but he doesn't argue with the interviewer when it's suggested some of the lyrics of his bitter break-up song She's Got a Way with Words, which is about a cheating ex, may apply to his former relationship. The star did not write it, but indicates he could relate to aspects of the tune, because he was really suffering.

"When we recorded the vocals for some of these songs, I was only six months removed from when all the crap went down," Shelton said. "When you have a broken heart - at least, when I do - you got to get it out of your system. You want people to sympathise with you. I was at rock bottom, in the middle of hell."

Blake turned to his fellow The Voice mentor and close pal Adam Levine for support, and he couldn't be more grateful for the Maroon 5 frontman's friendship after giving him a place to stay for a while.

"As close as we have been, we got even closer," he reflected of the tough time in his life.

Blake has since found love with another The Voice star, Gwen Stefani, but he insists their romance only blossomed after building up a proper friendship, as she also confided in him about her secret split from rocker Gavin Rossdale.

"It went from that (revealing their divorces), to checking in on each other once a week through email - 'This s**t happened to me, what happened to you?' - to maybe three times a week, then every day, to 'Hey, here's my phone number if you ever want to text.' Next thing I know, I wake up and she's all I care about, and I'm ­wondering if she feels the same about me."

"Gwen saved my life," he continued. "Who else on earth could understand going through a high-profile divorce from another musician? You can't even imagine the similarities in our divorces."

Gwen and Gavin, who had been married for 13 years, went public with their divorce news in August, 2015.

The No Doubt frontwoman, a mother of three, has also previously gushed about how Blake was her rock throughout her personal struggle and how their subsequent relationship gave her the strength she needed to bounce back.