It's been nearly two weeks since Billy Ray Cyrus stumbled onstage during a performance ... where Noah wore a Billy Ray shirt and posted a cryptic message about loving her father to her Instagram ...

“So proud of my Dad’s INCREDIBLE new single LOST with my good, old friend [Sam Tinnesz] and [Tommee Profitt],” Noah wrote with two red heart emojis. Noah Cyrus (L) and Billy Ray Cyrus during ...