After dropping out of the “American Idol” finale at the last minute, Arthur Gunn has spoken out about his decision to leave the show.

Gunn was set to perform with Sheryl Crow on Sunday’s finale, but after the “Idol” contestant allegedly refused to come out of his trailer five minutes before the show, producers were forced to swap in Season 19 finalist Graham DeFranco, who was sitting in the audience.

After the seemingly unrehearsed medley of Crow’s “Everyday Is A Winding Road” and “If It Makes You Happy,” judge Lionel Richie confessed that they didn’t “even know what happened.”

In an Instagram post on Tuesday, Gunn vaguely opened up about the “unpleasant environmental experiences” that caused him to ditch the “Idol” finale.

“Well, let’s just say I missed my opportunity to sing with legendary [Sheryl Crow],” Gunn wrote. “What happened is not much to discuss at this point. I would like to make it up and invite [Crow] to perform couple of songs on the July 30th at @thecotillion. It was last minute decision but I couldn’t help but say no cause of some personal morals and values due to unpleasant environmental experiences.”

Gunn continued, “It’s not necessary to state it, it is what it is, so I felt like I had to move on, It’s not the show to blame, they were there long before nor anyone related to show. I’m grateful for [‘American Idol’] for have given me this platform and helped me to reach out to you all. sometimes things happens and it happens for a reason I guess. I feel upset about it as much as all you might have, and I’m sorry if I did let down anyone but I felt like all these confrontations didn’t need to happen at the show, so I just had to move on from there, sometimes all we can do is move on!!!”

Watch Crow and DeFranco’s unplanned duet below.