Cher Horowitz is back. Four years after Iggy Azalea cosplayed as Alicia Silverstone‘s character in Clueless for her “Fancy” music video, Silverstone’s returning the favor. The American Woman actress appears on this week’s episode of Lip Sync Battle, and she performs—you guessed it—”Fancy.” And not just that: She wears Cher’s classic yellow plaid outfit—the one…