Some artists are at their best when they're down, their heavy emotions resulting in honest, soul-baring songs. The death of a friend or loved one can be particularly inspiring, with the resulting song serving as both a eulogy for the deceased and therapy for the living. With Memorial Day in the US becoming a time to remember all loved ones who have passed away -- not just those who gave their lives in military service -- we look at some of the most memorable songs written about the dearly departed.