Any suggestions for a soprano solo?

I need to pick a song for my solo and ensemble festival, and i would like something that will challenge me, being a sopre in high school. Last year I sang "Vergin, Tutt' Amore" without the voice trills. I don't think it fit my voice well, but I did fairly well with it. A few songs I like for this year possibly are "Coro Mio Ben" and "Tu Lo Sai". I don't know if I could do something more difficult, but if you have suggestions, I would appreciate them. I would very much like to go to state this year. :] Oh! I'm a soprano and can sing up to a high B. If possible suggestions other than Italian? French, German, and Latin are my other preffered languages. Thanks. [: