What song should my daughter sing for her vocal?

My 12 year old daughter has a dance festival in the next couple of weeks and for the first time she will be doing a solo vocal, but she don't know what to sing. She don't want to do a Disney song as she already does a Disney as a S&D she also does MJ heal the world as a S&D, a Bette Midler song for her trio. She said she wants something different we have gone over nearly 200 songs and she don't like any of them, please can some one give me some ideas as she is now driving me nuts!