Samantha Who? A better question is, Samantha what? Sam borrowed her dad's car, crashed it, and pushed it into a lake. When she confessed the incident to her mother, she was then blackmailed by her mom into doing a fashion show.
Christina Applegate is a talented comedian. Something about the way she flaps the evidence of blackmail in her mom's face seems seasoned and confident. She also benefits from having a good cast, especially that Jean Smart who offers an entertaining and very funny take on that often-seen Sarcastic Manipulative Mom character. You never think that a mother blackmailing her amnesiac daughter could be funny, but then Smart does it and all your prejudices go out the window.