Diana DeGarmo will be the honorary spokesperson for Global Youth Service Day, the largest volunteering event in the world. The three-day event, held April 25-27, is co-sponsored by CMT One Country and Youth Service America. DeGarmo is a former American Idol runner-up who starred in the CMT series, Gone Country. Taylor Swift was the celebrity spokesperson for the charity event last year. "On behalf of CMT One Country and Youth Service America, I am delighted to speak to youth about the importance of volunteering," says DeGarmo. "I am inspired and honored to be part of a generation that is recognizing more than ever the importance of giving back."