Not the whole thing. Just one or two whoaaa in the two chorus before the key change.

Example:
1st Chorus: Ohh we're half way there Whoaaa Livin' On A Prayer
Take my hand, we'll make it I swear, Whoaa Livin' On A Prayer

2nd Chorus:

Ohh we're half way there Whoaa Livin' On A Prayer
Take My Hand, we'll make it I swear, Whoaa Livin' On A Prayer

Bold Parts: Jon' Whoas xD

I can remember one for certain that he did one. It was in Paris 1995. They were opening for the Rolling Stones. The others I don't remember where it was.