Adalia Jimenez got that chance three years ago, when she was only 11. Her advice to Cassidy is, "...not to be nervous and just to have fun, because it will be over like that. I wish I could do it again.”

Adalia has performed several times since, just not with the Baltimore Symphony Orchestra.

As for Cassidy, it won’t be her first performance in front of an audience, but she knows it will be special.

“I’m excited," she says. "I didn't think it was going to happen.”