Everyone is feeling the pain.

Celebrities have taken to social media to express their condolences over the terrorist attack that occurred at a Ariana Grande concert in Manchester last night, and we've rounded up the most touching sentiments from some of the biggest stars.
    Taylor Swift:"My thoughts, prayers and tears for all those affected by the Manchester tragedy tonight. I'm sending all my love."
    Katy Perry: "Broken hearted for the families tonight. Broken hearted for Ari. Broken hearted for the state of this world. 😔"
    Demi Lovato: "My prayers are with you Manchester."
    John Legend: "Sending love to the U.K., @ArianaGrande and all of her supporters who were caught up in this awful attack. Heartbreaking."
    Bruno Mars: "No words can describe how I feel about what happened in Manchester. I don't wanna believe that the world we live in could be so cruel."
    Reese Witherspoon: "Sending prayers to the people of Manchester. I'm heartbroken for the lives lost and all the families suffering right now."
    John Mayer: "The parents. Their children. The dead. The injured. The artist. Her band and other performers. The crew. Venue staff. All to be thought of."
    J.Lo: "Thoughts, prayers and my whole ❤️ are with Manchester this evening."
    Dwayne Johnson: "Our prayers and strengh to the victims and their families involved in this tragedy in Manchester. Stay strong. @ArianaGrande 🙏🏾"
    Nicki Minaj: "My heart hurts for my sister, Ariana & every family affected by this tragic event in the U.K. Innocent lives lost. I'm so sorry to hear this."
    Harry Styles: "I'm heartbroken over what happened in Manchester tonight. Sending love to everyone involved. H."
    Lorde: "Every musician feels sick & responsible tonight—shows should be safe for you. truly a worst nightmare. sending love to manchester & ari."
    Selena Gomez: "My thoughts and prayers go out to everyone affected in Manchester."
    Pink: "My thoughts and prayers are with the people of Manchester, any one affected, @ArianaGrande and the entire crew. Heartbreaking."
    Kendall Jenner:"What happened in Manchester tonight is absolutely horrible. sending my love and prayers to those affected. 💔"
    Ryan Seacrest: "Stunned by the news coming in from the UK… my thoughts are with the fans and families at Ariana’s Manchester show. Awful."
    Lena Dunham: "Heart breaks for everyone at the @ArianaGrande show- terrorism and hatred disrupting a magical escapist experience. Sending all love."
    Khloe Kardashian: "God bless everyone who was at Ariana's concert! My prayers are with you all and poor sweet Ariana! This is heartbreaking 💔"
    Justin Timberlake: "My thoughts and prayers are with all those affected by this horrific act in Manchester. We need to do better. We need to LOVE ONE ANOTHER."

A visibly emotional James Corden also delivered a somber monologue shortly after the tragedy, and it's a must-watch. What a sad sad day for people all over the world.