“Grant will headline a concert that benefits the Natick-based charity Hope for the Children of Haiti (www.hfchaiti.org), which operates an orphanage and school in Port-au-Prince as part of its mission. “Whew, what a great organization,” said Grant. “I wasn’t familiar with it before I came on board to do this show, but I love being a part of it.” The faith-based organization, which has operated for more than 20 years, is looking to raise money to improve its facilities and expand its mission.”