The 35-year-old said not only would the star-studded continue but it “will do so with greater purpose”.
The hitmaker will take to the stage this evening at Old Trafford Cricket Ground following the Manchester Arena bombing at the end of her gig on May 22.
In a lengthy and defiant statement, Scooter commented: “After the events last night in London, and those in Manchester just two weeks ago, we feel a sense of responsibility to honour those lost, injured and affected.
London terror attacks: Ariana Grande's One Love Manchester gig will go ahead tonight
London terror attacks: Ariana Grande's manager Scooter Braun said it now had greater purpose Morning after London attack: Heightened police presence at Borough Market & Bridge Sun, June 4, 2017
SIX people have been killed after a horrific terror attack targeted London Bridge and Borough Market on Saturday night. These are the pictures are London wakes up to the tragic scenes
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We plan to honour them with courage, bravery and defiance
“We plan to honour them with courage, bravery and defiance in the face of fear. Today’s One Love Manchester benefit concert will not only continue but will do so with greater purpose.”
Scooter continued: “We must not be afraid, and in tribute to all those affected here and around the world, we will bring our voices together and sing loudly."
“I am pleased to say we have the full support of Greater Manchester police and the government and are assured the safety of all those attending is the highest priority. All artists involved have been unwavering in their support this morning and are determined to carry on with the show.”
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London terror attacks: One Love Manchester will be held tonight
London terror attacks: Ariana Grande met with Manchester victims yesterday
He signed off: “We ask the strong city of Manchester and the world to join us in making the statement that hatred and fear will never win. Today we stand together. Thank you.”
It comes shortly after Greater Manchester Police assistant chief constable Garry Shewan also said the event would not be axed.
“We would like to assure people that these will still take place, but with additional security in place to ensure the safety of everyone,” he said.
One Love Manchester will air on BBC One from 6.55pm.