British pop/soul singer Joss Stone will be among the headliners at the South African leg of the historic concerts on July 7, organizers said today.

Joining Stone will be veteran U.K. act UB40, Benin's Angelique Kidjo and Senegal's Baaba Maal.

South Africa will be represented by Grammy Award-winners Soweto Gospel Choir, as well as Afro-folk singer and songwriter Vusi Mahlasela, indie pop group the Parlotones, kwaito superstar Zola, and R&B singer Danny K.

Model Naomi Campbell will also speak from the stage at Live Earth Johannesburg.

The South African leg of Live Earth will be staged at The Cradle of Humankind, Maropeng, 40km northwest of Johannesburg.

Maropeng -- taken from a Setwana word meaning "return to the place of our origins" -- is situated in the Cradle of Humankind World Heritage Site, which organizers say "denotes the universal relevance of the Cradle of Humankind as the ancestral home of all, marking the birthplace of the human species in the continent of Africa".

The South African Live Earth concert at Maropeng is produced by BIG Concerts.

Live Earth, which was founded by the event's executive producer Kevin Wall, is being stage simultaneously on seven continents as part of a campaign on climate change.