Reaction to the fatal explosion at an Ariana Grande concert in Manchester, England: "Tearing up imagining innocent concert goers losing their lives..praying for everyone and all #arianators." — pop star Demi Lovato, via Twitter "every musician feels sick & responsible tonight_shows should be safe for you. truly a worst nightmare. sending love to manchester & ari" — singer Lorde, via Twitter Peter Hook of Manchester bands New Order and Joy Division tweeted that his daughter made it home safe from the Ariana Grande concert and added: My heart goes out to all parents & those involved.