Final answer:
The question about Michael Jackson and his sister is not tied to an academic subject or grade level and lacks context to provide a meaningful answer.
Step-by-step explanation:
The question you've asked does not pertain to a school subject or academic topic, as it seems to be related to a personal anecdote or claim about Michael Jackson and his sister.
Without additional context, it's not clear if this statement is part of a larger discussion or work, such as literature, history, or media studies, where the mention of these public figures could be relevant. However, the way the question is phrased does not allow me to categorize it within an academic discipline or grade level accurately.