The African Children's Choir will make an appearance on the American Idol - "Idol Gives Back" show, which will raise funds for charities in the U.S. and Africa.

The show, which airs live 25 April in the US, will feature the choir performing with Grammy-nominated American singer/songwriter, Josh Groban. The show is expected to be its largest viewing to date with nearly 60 million viewers.

On the scene for the last 22 years, the African Children's Choir has been heard and seen across the world.

Their personal stories of triumph through adversity are evidenced through their music and they have performed even at: the UN General Assembly; One.org with George Clooney, Lindsay Lohan and Ellen DeGeneres; Live8 with Mariah Carey, Annie Lennox and Sting; and the 46664 Concert with Will Smith and Nelson Mandela among others.

For every vote cast via phone or text message on the show, "Idol" sponsors Coca-Cola, AT&T and others will donate money to charity.

Organisations such as UNICEF, the Global Fund, Save the Children, Nothing but Nets and Malaria No More will benefit from the donations.

Idol Gives Back" also is providing a link on its website to One: The Campaign to Make Poverty History.

U2's Bono, co-founder of the One campaign, said "I wouldn't underestimate the reach of [Idol] or the impact its audience can have."