So I am going to be auditioning for Jekyll and Hyde in a couple of months, and really want to be Lucy. What would be some good songs to audition with? I am a soprano but I prefer to sing mezzo and belt.

Lucy was a servant in his household in London latter part of the last century, so I think some oppressed songs would be worthwhile for your audition. I don't think it matters much as long as it showcases your voice.

I'd go with songs from Scarlet Pimpernel. They are in a similar key and have the same "distressed" feel to them.

No One Knows Who I Am from Jekyl/Hyde is reminiscent of When I Look At You from SP.

Best of luck! Lucy is a great part.