Jason Aldean on 'SNL': 'When America is at its best, our bond and our spirit — it’s unbreakable\

Country singer Jason Aldean — who, with his band, survived the fatal Las Vegas massacre which claimed the lives of nearly 60 people and injured over 500 more — was a surprise musical guest on Saturday's airing of "Saturday Night Live."

During his impromptu appearance, Aldean offered words of encouragement to Americans, and also paid tribute to the late Tom Petty, who died at the age of 66 on Monday.

What did Aldean say about Las Vegas?

The show's cold open was incredibly somber.

The studio audience remained completely silent as cameras zoomed in on Aldean and his band on the dimly lit stage.

"This week, we witnessed one of the worst tragedies in American history," Aldean began.

Aldean and his band were on stage just minutes when shots first rang out, beginning the worst mass shooting in U.S. history.

"Like everyone, I’m struggling to understand what happened that night and how to pick up the pieces and start to heal," he continued. "So many people are hurting."

"There are children, parents, brothers, sisters, friends," Aldean added. "They’re all part of our family. So I want to say to them, we hurt for you and we hurt with you."

He concluded, "But you can be sure that we’re going to walk through these tough times together, every step of the way. Because when America is at its best, our bond and our spirit — it’s unbreakable."

Aldean and his band then launched into an emotional cover of rock legend Petty's "Won't Back Down."