THE GUEST: Anne Hathaway

THE CHARACTERS: Jenny (from ''The Good, the Sad and the Drugly,'' 2009) and Princess Penelope ([pictured], from ''Once Upon a Time in Springfield,'' 2010)

In less than a year, the Oscar-nominated actress managed to both tame the prankish Bart Simpson and woo the greasepaint-encrusted heart of his idol, Krusty the Clown. In the latter episode, the show's 450th, she adopts an endearing Lawng Island accent and employs her classically-trained singing chops to play the prickly Punchinello's studio-enforced co-host and eventual fiancée. No word on who'd get Mr. Teeny in a divorce. —Keith Staskiewicz