Machine Gun Kelly explains why he smashed glass against head during after-party

Following his concert at Madison Square Garden on Tuesday night, the musician and his friends headed to Catch Steakhouse for an after-party. Video footage shows Kelly giving a speech to the crowd and banging the glass against his head. Despite blood pouring down his face and neck and onto his clothes, the 32-year-old launched into an impromptu performance of his hit song My Ex’s Best Friend. Kelly appeared on Late Night with Seth Meyers the following night with the cut above his right eyebrow all cleaned up but still noticeable. Host Seth asked him to explain what happened.