Chrissy "Hair" Audition Help?!

[musicandlyrics365]

Hi! I am auditioning for "Hair" and am going to go in for Chrissy. I am a young, female soprano ingenue type who definitely fits Chrissy best. I want to shoot for this role, but need to sing a ballad an uptempo.

I don't want to sing a hard rock song because I don't think it would be appropriate for the role. I have some choices for numbers:

Sing "Frank Mills" or "Unworthy of Your Love" if I wanna go for musical songs (I'm trying to avoid "Godspell" just so as to not be so obvious). I could also do Leonard Cohen's "Hallelujah" or Billy Joel's "And So It Goes." Mainly I want to appeare sweet and possibly a gullible and vulnerable, the way Chrissy is.

I would love some tips!