How does that relate to her being lewd?
If anything, her repeated attempts at something that only ends up getting her beaten hint at a spanking fetish. And with a mini-skirt for easy access, you just know that's what she expects out of all of this. The singing and parading around on a stage is just foreplay to her. Trust me, there's a puddle on that stage when she leaves it.
At. Her. Lewdest.