The 51-year-old star adopted two children - Mercy, five, and David, eight - from Malawi and it is even rumoured that she is planning to adopt a third child from the country.
A source said to UK newspaper Daily Mirror: 'Madonna likes nothing more than rolling up her sleeves and shoving her paws down a blocked well. She likes to do her bit.
'When she adopted David she promised his dad she'd stay in touch and visit often. While Mercy Grace is pleading for another little brother or sister, Madge is not sure she's quite ready. But she's kept the door open and been in touch with the orphanage.
'She has big plans to raise money, including a possible charity concert next year.'