"I'm gonna have to stay home and recover for a little while," he shared on social media.
"This is bad," the singer told Jimmy Fallon of her initial feelings about the song.
"It was a very natural, respectful pass," the pop musician recalled in a recent interview.
The three-day event will take place from Sept. 22 to 24 in Downtown Las Vegas.
Interpol, Stone Temple Pilots and Rival Sons will support the band on the summer outing.
Leadon was a close friend of Tom Petty's, and played in two bands with the late rocker.
The superstar also reiterated why she chooses not to recognize birthdays.
Gad asked "when does this madness end?"
The song debuts at No. 77.
The track starts at No. 2 and 26, respectively.