The Oprah Winfrey Show remained as popular as ever, airing in 140 countries around the world. Many of her regular guests, including Dr. Phil McGraw and Dr. Mehmet Oz, have gone on to shows of their own, produced by Oprah's Harpo Productions. Over the years, she has also used her program to promote the many philanthropic ventures she supports. After filming a Christmas program in South Africa, she established the Oprah Winfrey Leadership Academy for Girls, near Johannesburg. Her legendary generosity has extended not only to her favorite charities, but to her loyal viewers. She celebrated the beginning of her 20th season on national television by giving every member of the studio audience a brand new Pontiac automobile.