List of people who have won Academy, Emmy, Grammy, and Tony Awards

Twelve people have won all four major annual American entertainment awards in a competitive, individual (non-group) category of the Emmy, Grammy, Oscar and Tony Awards. Respectively, these awards honor outstanding achievements in television, recording, film, and theater. Winning all four awards has been referred to as winning the ``grand slam'' of American show business.

Question: has anyone ever won an oscar and a grammy
Answer: yes