Shawn Mendes and Khalid sang a song called "Youth" at the Billboard Music Awards in Las Vegas backed by a choir of students from Marjory Stoneman Douglas High School, which was also the site of a shooting earlier this year.
Khalid, who won best new artist earlier during Sunday's broadcast, wore a shirt calling for the protection of children instead of guns, while the choir of students from Parkland, Florida, wore black hoodies with the word "Youth."
The performance earned them a standing ovation from the audience.
Copyright AP - Associated Press
