Material Girl singer previously confirmed she adopted four-year-old twins from Malawi.
Some 125 million child brides are still exposed to domestic and sexual violence, despite leaders' efforts.
Singer is already parents to four children, including adopted David Banda and Mercy James.
Snowden wrote the letter to Annie Alfred as part of Amnesty International's campaign against human rights violations.
EXCLUSIVE: The Real Food Cafe owner Sarah Heward speaks to IBTimes UK about the cause.
Eric Aniva admitted to having sex with more than 100 women and girls without revealing he is HIV-positive.
Eric Aniva had taken part in 'sexual cleansing' practices having sex with more than 100 women and girls.
If found guilty, Eric Aniva could get a possible jail term of 5 years.
IBTimes UK meets the teams using drones to combat wildlife crime in South Africa, Malawi and Zimbabwe.
In rising violent assaults, armed men have looted medicines, supplies and destroyed medical equipment.
Group is part of movement created in Denmark to provide alternative school system to troubled youths.
Aniva claims to have slept with 104 girls and women and is paid between $4 and $7 each time.
A 'hyena' is hired by communities in various circumstances to provide sexual 'cleansing' rituals.
In April, four people with albinism were murdered, the human rights group says.
Lucy Chekechiwa, 73, has said she is 'heart-broken' after being separated from her granddaughter.
Attackers target Alibinos' limbs or organs to be sold to witch doctors.
UNICEFF hopes drones shuttling blood tests to key labs will save time in battle to save lives
Zimbabwe is one of the worst affected countries by severe drought exacerbated by the El Nino effect.
Prophet TB Joshua claimed leaders of Malawi and Zimbabwe will die before 1 April.
Criminal gangs dubbed 'albino hunters' target those living with the condition to sell their body parts.
MPs have branded cuts a 'joke' and demanded better funding for public schools.
The gruesome murders come just weeks after four elderly people were killed over similar allegations.