Sarah only speaks in the series finale where it is revealed she was saving her voice for an upcoming talent show .
Sarah ( voiced by Alyson Court ) The most popular girl in the school who never speaks , only communicating through texts by Kelly and Kelli .
Sarah only speaks in the series finale where it is revealed Sarah was saving Sarah 's voice for an upcoming talent show .
Sarah ( voiced by Alyson Court ) The most popular girl in the school who never speaks , only communicating through texts by Kelly and Kelli .