Pop star Ariana Grande has said she is suffering from symptoms of post-traumatic stress disorder following the terrorist attack at her concert in Manchester last year. In an interview with for the July cover of British Vogue, the singer said that in comparison to those who were injured or died her problem is not so big, she even felt ashamed to talk about it before, because she was alive and physically healthy, and those people will never come back to normal lives, but she treats it seriously. Even a year after the tragedy she cannot talk about it without tears. The singer had just finished a concert at Manchester Arena when 21-year old Salman Abedi detonated a suicide bomb in the foyer area, killing 22 people as they left the venue on May 22, 2017. She organized One Love Manchester in June 2017, a free tribute concert held two weeks after the attack in honor of the victims. Nearly 11 million people watched the star-studded show, which featured Grande, Katy Perry, Justin Bieber, Miley Cyrus and a number of other celebrities.