Watch Thomas Rhett Review Kelsea Ballerini's Upcoming Album at iHeartRadio Festival

Talking backstage at iHeartRadio Music Festival on Sunday (Sept. 24), Thomas Rhett shared his excitement about having a No. 1 album -- and revealed he's heard all of Kelsea Ballerini's forthcoming album. 

Rhett wouldn't share any specific details about the highly anticipated Nov. 3 release, Unapologetically, telling Billboard, "She would kill me."

He did call the album "incredible" and said the first track, "Graveyard," is not his favorite. 

Rhett said his close friendship with Ballerini is an example of how supportive country artists are of one another: "We're all such a tight-knit community and actually are friends, so it makes sense to root for each other."

In the interview, Rhett also shares how he heard Life Changes topped the Billboard 200 and his first live performance with his father, Rhett Akins. Watch the interview in full above.