Regarding On the Twentieth Century... somewhere I had read that Prince kept nagging Kahn that she wasn't giving a full performance. Finally, at one performance, she went full out - singing, acting, getting all the laughs. Hal came back to her after the performance and said something to the effect of - You got it, that was it, don't change a thing! To which she replied, Surely you don't expect me to to that 8 times a week?