Grande was visibly emotional, and appeared to tear up as she finished the songs. He sang and offered encouraging words to the crowd, who held inspirational signs in their hands. "I think that the kind of love and unity you're displaying is the kind of medicine the world really needs".
A particularly sweet moment came when Grande joined members of the choir of Parrs Wood High School, located in a Manchester suburb, to sing "You Are My Everything".
The star - who fought back tears for most of her performance - then spoke about meeting with the mother of 15-year-old Olivia Campbell who was killed in the atrocity, and said she'd changed the whole setlist of the evening in order to comply with the young girl's wishes.
Grande wore a white sweatshirt with "One Love Manchester" written on it. "Thank you so much".
"I encourage you to choose love even when it's hard".
But while we were singing along and crying from our sofa at home, there was one very special tribute that completely passed us by.
"(God) loves you and he's here for you.
Bollywood's 'Smiling Beauty' Nutan's 81st Birth Anniversary, Google Pays Tribute
Nutan started her career at the age of 14 in the 1950 film " Hamari Beti , ' directed by her mother Shobhna". In the 1980s, Nutan started playing character roles and continued working until shortly before her death.
"I just want to take this moment to honour the people that were lost", he said, before pausing to compose himself. Thank you for being here and being so loving and strong.
USA pop star Ariana Grande has been photographed hugging youngsters at a Manchester children's hospital who were injured in deadly terror attack on her concert.
Britain said on Monday intelligence service MI5 was reviewing its processes following a suicide bomb attack which killed 22 people in Manchester, as questions continue over how much the authorities knew about the assailant.
Watch Grande's heartfelt performance in the video below. She sang Fergie's verse on the Black Eyed Peas hit, "Where Is the Love?" along with the group; she performed a duet with Miley Cyrus; and she performed her debut song, "The Way", with rapper Mac Miller. She blew kisses to the audience as the opening chords of "Somewhere Over The Rainbow" were played.
"I don't feel or smell or hear or see any fear in this building".
A star-studded lineup including Justin Bieber, Coldplay, Katy Perry, Miley Cyrus, Marcus Mumford and Take That is scheduled to perform.
Take That, who are from Manchester, followed Mumford with fun energy that the crowd danced to.
'Good even Manchester, ' singer Gary Barlow screamed.
All proceeds from the event will go toward the "We Love Manchester Emergency Fund," in partnership with the British Red Cross and Manchester City Council.