Just to save you a rental, never ever get Confessions of a Shopaholic. I loved the book... thought it was hilarious. But the movie absolutely, completely sucked. They took out everything that made the book funny and charming. The only thing that stayed the same were the names of the characters. They changed the plot, took out main (and essential) characters and even made the heroine American instead if British like the book. And in a truly bizarre Hollywood twist, the lead actress was an Australian putting on an American accent. How does that make any sense at all?
Anyway, my advice, do NOT see this movie. It's 104 minutes of your life you'll never get back.