The suicide bomber detonated an explosive device in the lobby of the arena on May 22, 2017, shortly after a concert by Grande. Over 800 people were wounded in the attack. Grande posted a message on her Instagram story, writing that the victims of the attack were always in her thoughts and that the ''anniversary will never be an easy one.'' ''Although grief is ever present and our relationship to it is constantly evolving and expressing itself in different ways every day, year round... I know that this anniversary will never be an easy one. Please know that I am thinking of you today. Manchester, my heart is with you today and always,'' she wrote.