You get disputes such as how Heaven Is A Place On Earth copied the commercial version of You Give Love A Bad name 

(other versions of Bad Name including acoustic and live can sound different from how the album produced version ended up, released as the lead single ) 

Then you get disputes where it is a different song with the same title 

eg I Wanna Hold Your Hand 

eg Thinking about you 

eg Mirror Mirror 

eg Shooting Star 

eg Heart of Stone 

I could go on 

anyway

 Love Is A Wonderful Thing by the Isley Brothers

 by Michael Bolton 

The problem here was though MB happened to write a song with the same title, some people feel the song sounds the same, at least in places, particularly the chorus

 The verdict he copied it subconsciously, not intentionally 

After all, where do songs really come from when someone starts to write them 

And everyone has influences they acknowledge 

With Bon Jovi, after the success of Slippery When Wet, when JBJ started writing what became Bad Medicine, the lead song from the new album, he had the same progression as Bad Name, more or less the same words and story 

So JBJ plagiarised himself without meaning to do it 

The song was rewritten and redone of course 

With MB, conjecture was he probably never heard the IB version - it was not a big hit when released, it was not a song played a lot on the radio, and many people say they never heard of it when the dispute came up