The One Love Manchester concert has notched up a new record to become the biggest TV show of the year so far - attracting a peak of more than 14 million viewers on Sunday night.
A suicide bomber set off a blast outside of Manchester Arena, where Grande was performing on May 22.
Ariana was joined by Black Eyed Peas, Robbie Williams, Take That, Justin Bieber, Coldplay, Niall Horan, Miley Cyrus, Katy Perry, Pharrell Williams, and Little Mix at the music extravaganza, where fans were also treated to a surprise appearance from Manchester's own Liam Gallagher.
Mumford & Sons frontman Marcus Mumford opened the show after the crowd fell silent for a minute.
The Manchester concert came the day after attackers targeted the heart of London, killing seven people. And then she told me that Olivia would have wanted to hear the hits.
More than 50,000 crowded into Emirates Old Trafford Cricket Ground to watch Grande headline the benefit.
Grande closed the show by inviting all the other performers on stage to help her sing her 2014 hit "One Last Time", before she closed with a moving solo version of "Somewhere Over the Rainbow".
Additional security measures were put in place for the concert, with police warning that everyone would be searched.More news: Neill Blomkamp's Oats Studios Teases New Series of Sci-fi Projects
"So many of our friends are in this great city".
Ariana, 23, suspended her Dangerous Woman tour, including cancelling two shows at London's O2 Arena, following the attack in Manchester on May 22, 2017. The choir's cover of the song quickly went viral after they performed it in tribute to the Manchester bombing victims.
One particularly emotional supporter added: 'If Ariana and Mac are engaged I'm going to cry a river of years'.
"We will not quit or operate in fear".
Charity concerts might be associated with Baby Boomers, Generation X and Millennials, but "One Love Manchester" begs us not to count out the so-called Generation Z just yet.
This makes sense considering the concert was aimed at uniting people and igniting "love" for everyone everywhere, in light of the recent atrocities, as well as to raise the much needed funds to support those who had lost loved ones.
Grande posted on Instagram about the visit, showing her chatting with a young girl in the hospital.
Sunday's concert was held on the eve of the first funeral of Manchester attack victims.