Biography Jessica Sierra is a 19-year-old from Tampa, FL who auditioned in Orlando. Jessica Sierra began her singing career at 3 years of age by emulating her grandmother, whom she has named her American Idol. Jessica was born and raised in Tampa, FL, and has been working as a live-in nanny for the past year. Her aunt is currently the mayor of Tampa. She has performed at talent shows, corporate events and in church, and has been a member of Entertainment Revue.