Because we all know the only reason you mentioned Madonna is in order to troll and cause a reaction. This thread is not about her, and she is obviously a game-changing artist that changed the way women presented and conducted themselves in music, as well as innovating musically (she was one of the artists that brought house to the mainstream in the late 80s/early 90s) and performance-wise. This is fact and it's not an opinion.
On the other hand, no one has yet to provide a reason why Tony Bennett has contributed to music and art in this thread.
Now, again, please take your blatant trolling elsewhere.