1) Oprah Winfrey is an American media mogul, television host, actress, and philanthropist. She is best known for hosting "The Oprah Winfrey Show," which became the highest-rated talk show in TV history, and for her influential role in the entertainment industry.

2) Meryl Streep is an American actress widely regarded as one of the greatest performers in the history of cinema. She has received a record number of Academy Award nominations and has won several awards for her roles in films such as "The Devil Wears Prada" and "Sophie's Choice."

3) The word "book" contains two vowels: O and O.

4) The United Nations Security Council is responsible for maintaining international peace and security, with five permanent members (China, France, Russia, the United Kingdom, and the United States) holding veto power over resolutions.