Machine Gun Kelly has announced his international “Mainstream Sellout Tour” — a colossal 52 arena run across North America and Europe. The multi-platinum selling artist’s first ever arena tour will perform at Little Caesars Arena on Sunday, July 3 at 8 p.m. Special guests Avril Lavigne and iann dior will accompany on the local date. The genre-bending performer has amassed over 15.5 billion streams online and sold over 10 million album units.