This is beyond horrible.

Celebrities jumped on social media to react to the news of the Las Vegas mass shooting, which left 50 dead and more than 400 injured, and everyone is understandably shaken. The shooter, a 64-year-old man named Stephen Paddock, opened fire on the Route 91 Harvest Music Festival with an automatic weapon from his hotel room at the Mandalay Bay.

"Tonight has been beyond horrific. I still don't know what to say but wanted to let everyone know that Me and my Crew are safe. My Thoughts and prayers go out to everyone involved tonight. It hurts my heart that this would happen to anyone who was just coming out to enjoy what should have been a fun night. #heartbroken #stopthehate," Jason Aldean, who was performing at the time, said on Instagram.

"Praying for all the innocent victims and their families in Las Vegas," Celine Dion wrote. "My heart is breaking for everyone in Vegas tonight. Simply devastating. So much loss," Kelly Clarkson added.

Here are some other notable reactions:
    Mariah Carey: "Horrified to hear about the shooting in #LasVegas. My thoughts are with the victims and their families. Praying for everyone's safety πŸ™πŸ’”."
    Bob Saget: "Oh God. Vegas. WTF is happening. Can’t keep up with all the pain this country is facing. Sending love to Vegas."
    Taylor Swift: "There are no words to express the helplessness and sorrow my broken heart feels for the victims in Vegas and their families."
    Josh Gad: "Oh God. Just woke up to this sickening news. What is happening to this country? Those poor poor people. I’m numb."
    Kate Hudson: "πŸ’” My thoughts and prayers are with you πŸ’” #StopThisHate #StopTheViolence 😒."
    Brad Paisley: "Praying for everyone at #HarvestFestival. There are no words right now that suffice."
    Adam Levine: "My heart is broken. I am sick with sadness for all those suffering in Vegas… and what remains of my broken heart belongs to you in this moment."

We're at a loss for words.