In 2015, ONE collected signatures for an open letter addressed to Angela Merkel and Nkosazana Dlamini-Zuma, urging them to focus on women as they serve as the head of the G7 in Germany and the AU in South Africa, respectively, in order to set the priorities in development funding before a main UN summit in September 2015 that would establish new development goals for the generation. The following people signed the open letter: Ali Hewson, Angelique Kidjo, Beyoncé, Charlize Theron, Christy Turlington, Danai Gurira, Helene Gayle, Lady Gaga, Lauren Bush, Mabel van Oranje, Dr. Maria Furtwangler, Meryl Streep, Michele Sullivan (president of the Caterpillar Foundation, director of Corporate Social Innovation), Naisula Lesuuda (senator, Kenya), Rita Wilson, Rosamund Pike, Sarah Silverman, Sheryl Sandberg, and Yvonne Chaka Chaka.