Video: 'CNN Heroes' has Sara Bareilles performing 'Brave' for the all-star tribute

Check out the above preview of "CNN Heroes: An All-Star Tribute," the annual CNN special that honors men and women from around the country who are performing extraordinary acts in their community.

In the above video, Sara Bareilles performs "Brave" as video of the heroes plays in the background. Read all about the 2013 heroes here at the CNN website. The heroes include four community crusaders, three medical marvels, two children's champions and planet defender.

Below, take a sneak peek look backstage at the production. The special airs Sunday, Dec. 1 at 8 p.m. ET/PT on CNN.

Photo/Video credit: CNN