I think Beloved John is worth a listen. Let's not get run over by misplaced compassion.
Jesus prayed for Peter to be converted.
He prayed for God to forgive His executioners because they did not know what they were doing. They were just following orders, according to plan.
Did He pray for Judas Iscariot?
Miley Cyrus knows exactly what she is doing. She is spitting at God, His plan of salvation, and His Savior, the Messiah.
Clearly, she is not being disciplined by The Father, as a child of God would, were he/she His.
"But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons" (Heb. 12:8 AV).
Of course, I don't want to see anyone in Hell, but it's a choice for those headed there.
I don't know her inward dispositions --- and neither do you --- but I doubt she knows exactly what she is doing. I doubt she has the mental clarity or the emotional self-possession to think precisely about much of anything. She may be on drugs or out of her right mind. She may just be an idiot. God knows.
Jesus prayed for the whole world. I don't think He excluded anyone from His prayers. He is the Savior of the World.
John 1:7
The same [John] came for a witness, to bear witness of the Light, that all men through him might believe.
1 Timothy 2:1
I exhort therefore, that, first of all, supplications, prayers, intercessions, and giving of thanks, be made for all men.