Though this belongs in the STUDENT section, I'll try helping you out [but only because I'm in a good mood today

].
First of all, what is the show you are doing?
If you need something upbeat, you could try "Cabaret" [Cabaret] or "I Move On" [Chicago]. I know, technically, they aren't soprano songs but they were the first two that came into my head.
Good luck and break a leg.
"I am and always will be the optimist. The hoper of far-flung hopes and dreamer of improbable dreams." - Doctor Who
"Yes, the brutalities of progress are called revolutions. When they are over, men recognize that the human race has been harshly treated but it has moved forward." - Les Miserables