How does Jon BON JOVI do his SCREAMS?

Hey, I'm just wondering if you have any idea, how does Jon Bon Jovi do the ,,screams" in Living In Sin or I'll Be There For You, It's a very unique type of sound I haven't heard anything like that, with that bright overtone, ever. Thank you so much, for any and every help.
Living In Sin from 89 - 4:50
https://youtu.be/7hRWYstxpQQ?t=288
And I'll Be There For You - original - 3:59
https://youtu.be/mh8MIp2FOhc?t=239
But I actually like it better here - 4:32
https://youtu.be/gOIc-XIAyB8?t=271
Living In Sin from 89 - 4:50

And I'll Be There For You - original - 3:59

But I actually like it better here - 4:32

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