A celebrity is someone who works hard all his life to become known and then wears dark glasses to avoid being recognized.

The quip satirizes celebrity as a self-defeating pursuit. Allen points to the contradiction that fame is sought through relentless self-promotion—“works hard all his life to become known”—yet once achieved, it becomes a burden requiring concealment—“dark glasses to avoid being recognized.” The joke implies that celebrity culture manufactures desires that cannot be satisfied: recognition is both the goal and the problem. It also hints at the loss of privacy and authenticity that accompanies public notoriety, suggesting that the celebrated person becomes trapped by the very attention they worked to attract.

1) “A celebrity is a person who works hard all his life to become known, then wears dark glasses to avoid being recognized.”
2) “A celebrity is someone who works hard to become known and then wears dark glasses to avoid being recognized.”