Ariana was on Ebro's show on Beats 1 Radio Friday when he asked about her track "Get Well Soon" from her "Sweetener" album, and the importance of it to her in relation to last year's terror attack.

The singer's instantly overcome with emotion, but manages to get into how she -- and so many others -- have internal issues we're all dealing with ... and the song is meant to give everyone a hug.

But, she admits she's been deeply affected by the traumatic incident in Manchester, saying ... "It's like people are permanently affected by this s**t and it’s just like, perspective. It changes everything, changes your life quite a bit."

Ariana says she tries not to give into fear for her fans, but the truth is ... she's scared. She says she feels it when she travels and hates the extra security measures she has to take to feel safe, but that's the way it has to be now.

22 people were killed in the Manchester bombing. Less than a month later, Ariana was joined by stars like Justin Bieber, Miley Cyrus and Liam Gallagher to put on the One Love concert in Manchester to honor the victims.