Headliners will include BADBADNOTGOOD, Broken Social Scene, Rita Chiarelli & Sweet Loretta, The Flatliners, Hamilton Superstars, and Raine & Chantal. Supercrawl 2023 marks the 15th anniversary of the much-loved music and arts festival on James Street North. This year it runs Sept. 8-10, and the principal lineup was announced at a media launch event at…