I think this is playback but.. Maybe It isn't..
 

I was watching some downloaded bootlegs but this one in particular made me wonder..
It was Keep the faith and Bed Of Roses "Live" '93 Countdown, Holland. Something like that.
At first I thought "wow! Jon is singing amazing the keep the faith chorus" but then I started to get suspicious.. and it seemed to me that they used playback for the chorus ("You know you're gonna live.. etc") and for the backing vocals.. but evertything else was live.. If any of you have the video please tell me! I wanna know!

That version of Keep The Faith (If real..) is absolutely amazing.

Well I didn't see the video but I don't think they would lip-sync. Jon had a very strong voice in the 90's. I have a live version of Keep The Faith on the Real Life single and it was recorded in 1993. That was also a very great performance.

Yes in the 90's especially faith era jon's voice was amazing i got lots of bootleg from the early 90's they sounds great.

Yeah I think Bon Jovi were in top form around that time, and even if you watch the "An Evening With Bon Jovi" video you notice that a lot of the KTF songs are almost exactly like the studio versions.

Is that the video where they do an Elvis song? Or at least Jon imitating Elvis?

that was playback indeed. Some songs like prayer acoustic were done live. You can hear quite clearly which songs are done live and which not so..

In an evening with Jon imitates Elvis on love for sale and does some dancing like elvis on some song. Great show btw.