I'm thinking Bunny would let me melt bismuth in her pans [1] before she would accept Melodyne [2] (link via Instapundit [3]) as a valid music making tool. It definitely looks more flexible than Auto-Tune [4] (say, add a harmonizing vocal track only to words sung in B, for instance). The vocals that are “corrected” are still noticeable—it's just a different effect than the robotic reverberations of Auto-Tune. Don't get me wrong, it's still noticeable, but it isn't … um … as tinny? Robotic? Computerized? as Auto-Tune.
So … Tool? Crutch? [5] Does it depend upon your viewpoint? As a non-musician, I find Melydyne [6] to be an incredible tool to allow people who otherwise can't carry a tune to create music. But Bunny, having had musical training, might think differently (I can relate—I hate PHP [7] yet it allows people who aren't programmers write programs, for better but usually worse).
[2] http://pjmedia.com/lifestyle/2015/06/14/celemony-melodyne/?singlepage=true
[3] http://pjmedia.com/instapundit/209579/
[4] https://en.wikipedia.org/wiki/Auto-Tune
[6] http://www.celemony.com/en/melodyne/what-is-melodyne