What are good musical songs for a mezzo soprano/alto for a solo?

Over this summer I plan on working on a musical song for choir for auditions for the next school year. And I'm having difficulty finding a good song for my vocal range. I feel more comfortable with songs that range from the F below middle C to the C an octave up from middle C. (I'm talking in treble cleft to be exact.) And I was wondering if any of you on here could suggest some songs that would be good for my voice?