I'd have to say that we assume to know her past, her upbringing, what formed her, and what drives her decisions... And it's arrogant to judge her like we do. How do you know she's not a victim? Prostitutes and strippers who are trafficked often walk into these situations because being victimized in their childhoods. They are living a victim lifestyle and therefore walk into victimizing situations. If she's a figurehead, then how can assume that (especially since she's been at show biz since she could walk) she was also not manipulated into this situation until she felt like it was her choice. Regardless of whether she's a victim or not... She's still a creation God. Was Paul always a good example? No, but God still chose to break through to him. Was Gomer a God-fearing woman? Certainly not, yet God still told Hosea to keep pursuing her... Hosea still loved her. Was Rahab an upstanding prostitute? Don't think so, but Jesus came from her blood line. Moses became a great man and yet he was banned from entering the promised land, but God spoke to him. Jonah walked in the opposite direction of God's calling and yet he was a prophet. David was a man after God's own heart and yet he wasn't allowed to build God a temple... but he was still used by God.
God doesn't differentiate between victims and perpetrators. He doesn't love you less if you choose to sin or if you are "forced" into it. All those little girls are victims in a sense. But who are we to judge what purpose God may have for anyone?
If this was some girl dancing the same dance on a street corner, it would not be news. But it's Miley... we think we know her because we saw a part she played on Disney. We think we can judge her because we read the propaganda put in magazines and on the internet. We don't know her. I don't know her... but I can guarantee that God does and He wants to work with her.