Beyonce and Madonna team up for charity gig

Singers Beyonce and Madonna, activist Gloria Steinem and Bishop Desmond Tutu will be among big names reaching out to a billion people from a pop concert in London on the weekend.

The Sound of Change Live gig headlined by Beyonce, Florence the Machine and Jennifer Lopez will be broadcast live from Twickenham sports stadium to 150 countries on Saturday (Sunday NZT), and on primetime TV in the United States the following day, organisers say.

The four-hour concert could fund at least 120 projects supporting women and girls in more than 70 nations, if all the tickets are sold, they said.

Organised by the Chime for Change campaign, started by Italian fashion house Gucci, every ticket buyer will be able to choose which project their ticket will fund in what the campaign said was a world first for such a venture.

Madonna will be a presenter at the gig alongside other musicians, public figures, activists, film directors and actors including Indian stars Aishwarya Rai and Abhishek Bachchan.

"Over 60% of the children in the world not in school are girls," Madonna said.

"Two-thirds of the world's illiterate are women. I do not accept this. We need to change this and we will change this," she added.

In addition to performances and collaborations from artists, the concert will serve as a platform to broadcast inspirational and provocative films and stories highlighting women's issues around the world.