The 52-year-old Good morning Britain presenter backtracked and praised Ariana’s organisation and performance just 13 days after the fatal bombing at her sold-out concert on Monday, May 22.
Ariana and other huge artists took to the stage to perform in honour of those who lost their lives and were injured.
Watching the live broadcast, Piers tweeted: “I thought Ariana Grande was wrong to fly off after #ManchesterAttack. But tonight she’s putting on a fabulous show. #OneLoveManchester.
“I’ll say this too about @ArianaGrande – she has a cracking voice. By far the best vocal performance tonight… #OneLoveManchester tv.
“I misjudged you, @ArianaGrande & I apologise. You’re an admirable young woman & this is a magnificent night. Respect. #OneLoveManchester.”
One Twitter follower quizzed: “Are you just being this nice because you don’t want to actually apologise?” to which Piers replied: “I only ever apologise if I’m wrong. Very rarely happens.”
He added: “Great to see Take That & @robbiewilliams rocking Old Trafford. We go back a long way… they’ve just aged a lot better. #OneLoveManchester.”
Piers’ apology comes following his response to news that the Queen had visited Manchester Children’s Hospital to speak with people wounded in the attack.
At the time, he posted: “If the Queen can visit the victims in hospital, so can the star they paid to see. I expected her to stay, visit & comfort her wounded fans & relatives of those who died,” adding: “Apologise for what? I suggested she should do something she is now going to do.”
Replying to a Twitter user who responded to his initial comments by saying Ariana was “probably traumatised herself”, Piers said: “Probably not as much as those killed and wounded. She should have stayed to visit her injured fans. I can 100 per cent guarantee you I would stay and visit those who had been killed or wounded watching me perform.”
Fans and celebrities from across the world paid tribute to the victims of the manchester bombing while watching tonight’s commemorative gig.
Richard Madeley tweeted: “Manchester benefit concert such a confident cultural response to those sick, twisted delusional killers. Well done Mancs! We’re proud of u,” as Martin Kemp posted a simple heartfelt message: “ONE LOVE!!!!”
YouTube vlogger Zoella wrote: “Already so emotional watching #OneLoveManchester! What @ArianaGrande has pulled together is just incredible! So much love at that concert.”
For up-to-date One Love Manchester coverage, follow our live updates here.