The 'Mr Rock 'n' Roll' singer was pushed in the studio by his producer, who made him sing in keys much higher than he was used to.
He said: ''He really forced me to sing in higher keys than I did on [2010 album] 'Born Free'. We just kept running the capo up the guitar neck and I was straining, and he said, 'Trust me, you're such a good singer, you need to be pushed. And if you sing in these keys for the next couple of years, you're going to become a great singer.' And lo and behold, the f***er was right again.''
Kid has a track on his new album, 'Rebel Soul', called 'Let's Ride', which is dedicated to US troops, and he says he wrote it as a rocking tune to counter all the maudlin country songs that get written for them.
He added to Classic Rock magazine: ''I travel all over playing for our troops. I got to see and hear a lot and talked to a lot of people embedded in the world, and they get a lot of hokey country songs written for them. I thought I'd write something hard and heavy but still melodic, and it's not f***ing politically correct. But to get them jacked up when they go out to do the dirty work, something they can be proud of.''