Honestly yesterday I searched in google for the Bollywood movies copied from Hollywood - and OH GOSH!!! it's a HUGE list. I have seen most of these movies from both Bollywood and Hollywood. I won't say that Bollywood is not original, because few of the great movies are original stories!
However, here is my list for the top 10 Bollywood movies "inspired" from Hollywood, some are HIGHLY copied (the whole plot) and some of the movies just copied few scenes or the idea. Though these are the top 10, but there is no ranking exactly -