The 40-year-old singer was performing in Las Vegas when a gunman opened fire on the concert-goers, which was described the deadliest mass shooting in modern US history.
Before his performance, Aldean said America will take some time to get back to normal, but the people will stand up for each other in these trying times.
"This week we witnessed one of the worst tragedies in American history. Like everyone, I'm struggling to understand what happened that night and how to pick up the pieces and start to heal. So many people are hurting they're our children, parents, brothers, sisters, friends, they're all part of our family. So I want to say to them: we hurt for you and we hurt with you.
He then sang Petty's 'I Won't Back Down' honouring the singer, who passed away at the age of 66 earlier this week after suffering cardiac arrest.
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