I'm new... so hi!

I've been posting frantically in every community I'm in, looking for help with an audition.  I'll be auditioning for Seussical the Musical really soon, and it's with a professional theatre that requires a short monologue and 2 songs of contrasting styles but in the same style as the show.  I've looked online and through my sheet music.... but I can't think of anything.  Can anyone help me?  You'd be my hero forever.

I'm a mezzo, thinking about going for Mrs. Mayor, and I know she's not a huge character, but I just want her for some reason.  I can hit higher notes on a good day, but I'm positive I'll be really nervous so I'm trying to stay away from songs with tons of higher notes.

Thank you so much in advance.