On April 1, 2007, O'Neil attended the annual Juno Awards, where she was nominated for Best New Artist. Coincidentally, one of the other nominees was her Canadian Idol successor, Eva Avila. However, Tomi Swick took home the award. Since then, O'Neil stated that she was working on her second studio album, which she aims to illustrate her full musical aspirations, and allow her to grow as an independent, imaginative Artist. She starred in the musical of Dirty Dancing in Toronto, Ontario as a featured singer. She then played the role of Gabriella in High School Musical On Stage with Drayton Entertainment in St. Jacobs and Penetanguishene and was featured as a lead in the Stage West Calgary production of "British Invasion", alongside former lead singer of The Guess Who, Terry Hatty. O'Neil made her Stratford Shakespeare Festival debut during the 2011 season as Martha/Maid by the Fire in Jesus Christ Superstar and she made an appearance in Camelot. She played Eponine in a sit-down production of Les Misérables in Toronto at the Princess of Wales Theatre, which ran from September 2013 through February 2014. For this performance, she won the Dora Award for Outstanding Female Performance. O'Neil later served as both a member of the ensemble and an understudy for the roles of Éponine and Fantine in the Broadway revival of Les Miserables, which opened March 2014. She was then promoted to play Éponine.