I Only Know Two Pieces; One Is

Always Remember To Forget The Things That Made You Sad, But Never Forget To Remember The Things That Made You Glad.

I Learned To Play The Piano On My Mother's Knee - That Was Before We Got A Piano.

...the Elephant Smoked Too Much.

The Elephant Smoked Too Much.(explaining Why The Keys Of His Piano Were So Yellow)

Well, All's Fair In Love, War And Fooling The Critics.