I caught a cold.
A mean one with a fever.
I was coughing so much I couldn't sing!
...which is actually usually the case when I get sick in general.
When it was concert time on Friday and Saturday, I was still unable to sing.
I stood up and mouthed the words on Saturday's two o'clock performance--trying to sing a few notes here and there.
I'm sure I sounded terrible.
I'm also sure I was more a distraction to the performance than a helpful performer.
So, I didn't sing at the night's performance.
One concert out of three after practicing for ten weeks, memorizing, and missing one rehearsal.
One is better than none.