The former Fifth Harmony singer said the 23-year-old pop star was left shaken when 22 people were killed and 59 injured when a nail bomb was detonated in the main foyer of Manchester Arena.
The "Bad Things" hitmaker said it is amazing that Grande has bravely decided to come back to the northern city for her the benefit gig in aid of the victims of the horrific atrocity alongside some of the biggest names in pop music, reported Contactmusic.
Talking about the gig, which will be held on Sunday, she said, "I feel like it's horrible that it takes that for people to come together like that, but I am super proud of her.
"And I think coming back to Manchester especially, with everybody is amazing.