What is a good song for a girl to sing as her grand entrance at her bat mitzvah? she loves broadway.?

This girl has her bat mitzvah in a few weeks, and needs to choose a song to sing, going into her party as a grand entrance. She really wants to sing something broadway, but it needs to be an appropriate song for that. She would like something a little more up-tempo, or that starts slower, and grows faster. Any ideas? She is quite desperate.