Blowhard, Esq. writes:

While filming this key scene in a high-stakes production, Fox’s attempt at an all-black musical, Lena Horne kept flubbing her takes with a weak performance. Co-star Cab Calloway took her aside and said:

This is your one chance. You’re going to ruin it for everyone. Bitch, you know what we’ve gone through. Think about somebody in your family that’s died and sing the song.