[on Irving Berlin] Irving couldn't play a scale, an arpeggio - nothing. He had no piano technique at all. But inside, he hears it. I remember in particular, when we were together and he was doing a song for Fred Astaire and Ginger Rogers in the picture 'Carefree'. It's called 'Change Partners'. He came to a spot in this, where he played a plain diminished chord, and he turned to me helplessly and said, 'Is that the right chord?' 'Well' I said, 'I don't think it's the chord you hear, somehow or other'. He said, 'No, that's not it. You play me a chord there'. I played him one. He said, 'No, that's not it'. I played another. 'That's it!' he said. He couldn't put his fingers on it, but he knew which one it should be. Fantastic.