Justin Bieber turned out to be the biggest rock star at Ariana Grande’s One Love Manchester concert, which proved one of the most moving moments of the night as he broke down onstage. JB went on late into the benefit show Sunday with nothing more than a guitar and his voice. It was incredibly effective, as he got almost the entire crowd to sing along to some of his hits.

JB eventually did a prayer for the fallen victims of Manchester, and even asked the crowd to put both hands up in the air and to repeat after him in honoring those victims.

Ariana Grande raised more than $2.5 million for the victims of the Manchester terror attack with her One Love benefit concert. All the artists performed for free on Sunday.