The Biebs broke down at the end of his acoustic performance...
Justin Bieber has delivered a rousing tribute to the 22 people who died in a bombing at fellow pop singer Ariana Grande's concert in Manchester a fortnight ago.
The pop star sang two of his hits, 'Love Yourself' and 'Cold Water' during the benefit show - but it wasn't his singing that was the most memorable part of his performance.
After his opening song, the 23-year-old started a rousing chant comprised of just the word 'love' amongst the thousands gathered at Manchester's Old Trafford cricket ground.
Later, while performing an acoustic rendition of 'Cold Water', Bieber told the crowd "I'm not gonna let go of hope, I'm not gonna let go of love, I'm not gonna let go of God".
"Put your hand up if you're not letting go," he said, as thousands of hands were raised into the sky.
"God is good in the midst of the darkness. God is good in the midst of the evil. God is in the midst - no matter what's happening in the world, God is in the midst.
"He loves you, and he's here for you," Bieber continued, welling up as an overhead camera captured a police officer and some young girls holding hands and twirling in a circle - the crowd cheering as the beautiful moment appeared on the screen.
"I just wanna take this moment to honour the people that were lost or taken - we love you so much. To the families, we love you so much.
"Put both hands up to honour those people right now. Everybody say 'we love you, we honour you'," he called out, with the audience repeating the phrases back to him in perfect unison.
"Thank you so much for having me guys. I love you," he said, before disappearing off-stage.
Bieber was one of a number of prominent artists to feature at the benefit concert, playing alongside Coldplay, Black Eyed Peas, Miley Cyrus, Katy Perry and Robbie Williams.
All proceeds from the show will go to the British Red Cross for its Manchester Emergency Fund, which can be donated to here.