Researchers wanted to know the happiest and saddest songs ever, so they developed a method to scientifically determine just that.

One of the saddest classic rock songs was written by The Rolling Stones' Mick Jagger and Keith Richards and recorded by another star.

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In compiling this list of country music's most depressing songs ever, we left out a lot of great sad songs ... of the most depressing country songs of all time. Does your No.