I really hate what she's doing in this transition phase. It's terribly offensive to fans and families alike. What's her message? "Hey girls, here's where you go after being a nice kid. Whore it up, that's the next step!"
I get that she wants everyone to know she's not a little girl, and it's okay to experiment a bit. But this? This is the kind of behavior that ruined Brittney and Lohan, and it's terribly confusing to kids who look up to them. Her handlers are way, way out of line or pushing, leading or supporting her in going this direction.
Overlooked by a lot of people in this is Robin Thicke. What a tasteless song, and what a douchey thing for him (34 and married) to do to pretend he was ramming her (20 and confused) from behind. Completely disrespectful and inappropriate way to perform in front of kids.