Trying to find the title of movie where a "lover boy" is killed by three woman in a hottub and then he's reincarnated as a woman as punishment for his womanizing.

There were a few movies made like this. Can't remember the hot tub scene but it might have been in Switch. Are you talking about an oldie or something a bit more current. Here are two that come to mind immediately.

Goodbye Charlie (1964) (http://www.imdb.com/title/tt0058154/)

Switch (1991) (http://www.imdb.com/title/tt0103016/)

Let me know if these aren't it and if not, if there is any other details you can remember. I am sure I am missing a couple of movies with this theme, but I will track them down for you. :)