4. Harry Chapin - 'Cat's in the Cradle'
AM radio was full of tearjerker songs in the 1970s, but Harry Chapin's 1974 hit "Cat's in the Cradle" is the king of them all. As everyone who ever attended summer camp knows, it's about a father who is too busy to spend time with his son. At the end, the grown-up son is too busy for his elderly father. It began as a poem by Chapin's wife, Sandy; her first husband's father was a New York politician and they had a strained relationship. Chapin died in a car accident in 1981 and he never got to see his own children grown up, making the song somehow even sadder.