Beyonce has paid tribute to her mother Tina Knowles in a new video for Chime for Change, Gucci's global campaign for women's empowerment. The 31-year-old R&B superstar cited her mother as the most influential female in her life, saying, "My mother's gift is finding the best qualities in every human being.I think her gift is understanding and helping people get to their best selves," Beyonce said of her mother, who used to design the costumes for Destiny's Child.

At the end of the new clip, a banner asks viewers, "Who do you chime for?" It was launched in support of an upcoming concert The Sound of Change Live, which will see Beyonce, Ellie Goulding, Florence and the Machine and Rita Ora highlight women's issues at London's Twickenham Stadium. "Our goal is to call for change for girls and women in the loudest voice possible," said Beyonce, adding that the event was a chance to "bring the issues of education, health and justice for girls and women to the world stage."

Chime for Change was launched in February by Beyonce and co-founders Salma Hayek and Frida Giannini, Creative Director at Gucci, in partnership with the fashion label. Beyonce added, "Girls have to be taught from early on that they are strong and capable of being anything they want to be. It's up to us to change the statistics for women around the world."

Beyonce KnowlesBeyonce At The Grammy Awards 2013