What is the name of this tv show?

okay, so this is what I remember: the main character is a skinny beautiful and self-absorbed woman and has a gorgeous boyfriend. She unexpectedly dies and goes to 'heaven' their she meets some sort of angel who for some reason has a computer (I don't really remember why) and when he leaves for a second she hits the 'return' button and is sent back to earth except she's overweight and isn't as beautiful as she was before. She complains and stuff and has to pretend to be that lady or something. Please name this tv show! I can't remember what it was called!