Bucky Covington and Billy Ray Cyrus: Country Thunder duet?

Here's an interesting snippet from the Arizona Daily Star's review of Dierks Bentley and Billy Ray Cyrus' evening performances at the Country Thunder festival yesterday:

During his pre-concert interview backstage, Cyrus said he was comforted that that future would flourish, an opinion that was no doubt bolstered after he shared the stage with Covington during an astoundingly good cover of Van Morrison’s classic “Brown Eyed Girl.”

Billy Ray's set wasn't on the video stream at iClips last night (though there might have been some audio on offer.) If anyone has more details on this intriguing combo, please pass it along...I'm very curious! Thanks--Winnie