Question

I have a voice recital coming up and I need to sing a broadway song what would be good for a mezo-soprano

Answer 1

Here's what I've found that might fit in your range:
Mama will provide, Once On This Island
Home, Beauty and the Beast
Feed the birds, Mary Poppins
There are worse things I could do, Grease
Hope this helped!

Answer 2

It all depends on your vocal range. If you're strictly Mezzo, I would recommend a song like Everything Else (Next to Normal; censored version)
Freeze Your Brain (Heathers)
Fight For Me (Heathers; censored)

It will help a lot if you have a belt. If you have a belt, I'd recommend:
Mama Will Provide (Once On This Island)
Waiting For Life (Once On This Island)
I Dreamed A Dream (Les Miserables)
I Miss The Mountains (Next To Normal)
I Can't Do It Alone (Chicago)
No Good Deed (Wicked)