I don't know if you remember this episode but it is one of my favorites from the classic show.
Though in the episode it was actually Evil Lyn who takes control of Celice's mind, I wanted to use Skeletor in my pic cause... I love Skeletor.
Celice had to power of putting almost every living creature to sleep by singing and she was even able to open the Jaw brige of Grayskull with her voice. Skeletor wanted her to defeat the Sorceres and to open the Jaw Bridge of Castle Grayskull.