Jason Aldean Covers Tom Petty's ''Won't Back Down'' During Surprise Saturday Night Live Performance

Jason Aldean Covers Tom Petty's ''Won't Back Down'' During Surprise Saturday Night Live Performance Jason Aldean Covers Tom Petty's ''Won't Back Down'' During Surprise Saturday Night Live Performance Jason Aldean won't back down. Days after the Las Vegas tragedy occurred during his set at Route 91 Harvest Festival, the singer appeared on stage on tonight's Saturday Night Live to make a powerful speech and to honor the late Tom Petty.