#PrayforVegas trending on Twitter as stars react to Las Vegas mass shooting

Stars react to the Las Vegas mass shooting as a new hashtag trends on Twitter.

At least 58 people were killed and more than 500 others injured when a gunman opened fire from the nearby Mandalay Bay Resort and Casino. Officials said the gunman killed himself.

Aldean, who scrambled to safety, later posted on social media an image of Las Vegas with the words "Pray for Las Vegas."

Since then, the hashtag "#prayforvegas" has been trending on Twitter. Here are some of the stars tweeting about the tragedy in Las Vegas.

She was joined by many other celebrities.

Some stars, like Ariana Grande, got political in their response. Twenty-two people were killed by a terrorist at the singer's concert in Manchester, England this past May.