After a performance at Bowery Ballroom in New York City, the British pop singer Tom Grennan was attacked early Thursday morning and was badly injured and hospitalized as a result. His manager first shared the news that Grennan was attacked and indicated it was an “unprovoked attack and robbery outside a bar in Manhattan.” Grennan recently uploaded a video to his social media pages out of hospital saying he is “all good” after the incident. “It was just wrong place wrong time and I was punched, knocked out, and I woke up, and I was like, ‘Woah, what went on?’” He confirmed that his main injurie…