Billy Ray, 53, fit right in with the glam rockers as he donned a leather jacket, sunglasses, long hair and a Steven Tyler-esque scarf.
Miley really used all of the stage space -- dancing and singing around the musicians and using their props. Donning a skimpy black jumper and thigh-high boots, the "We Can't Stop" singer jokingly looked at herself in a mirror during the performance, and later grabbed a scarf and sunglasses.
"She's always getting into something new," Billy Ray said of his daughter’s Instagram post that hinted at a "Call Me Caitlyn"-themed collabo involving her Happy Hippie Foundation. "I wouldn’t be surprised at all."