He said: "Oh, let me tell you, I am so worried. I look at guys like Sting and think, 'Well, he's cool about losing his hair,' but I'm already losing a bit and I'm so aware of it.
"Someone told me that you have to regularly massage your scalp so I do that all the time. You look like a jerk but it's got to be worth a shot."
...he's also sacrificing chooks to save his voice.
His singing coach recently revealed she kills chickens to cure the 'Livin' on a Prayer' star's vocal problems.
Katie Agresta - who has worked with Steven Tyler, Cyndi Lauper and Lenny Kravitz - is known for her 'Voodoo Voice' techniques which she uses to combat musician's ailments.
So now you know... Every time Jon hits a note, another fowl bites the dust... LOLWTF?