In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.

Title: Joy. Sentence 1: Lilly loved Christmas time. Sentence 2: She always got to help her mother with baking and decorations. Sentence 3: But this Christmas would be much different from last year. Sentence 4: Her adopted baby sister would be arriving on Christmas Day.
Lilly baby sister Joy arrived then everyone sang her Christmas carols.