Britney Spears guests to help Sabrina face her 18th birthday, and her loneliness after Valerie moves and Harvey dumps her. Meanwhile, Hilda and Zelda try to hold it together when she jets off to Paris to live with her dad (Doug Sheehan). Brad: Jon Huertas. Gail: Jacqueline Schultz. Mr. Kraft: Martin Mull. Voice of Salem: Nick Bakay. Custodian: Jerry Hauck.