【The Erotic Adventures of Zorro】

Madonna's happy brood of four will soon be The Erotic Adventures of Zorroa brood of six. The pop star recently announced that she's adopted twin sisters from Malawi named Estere and Stelle.

Madonna posted a photograph of her and her daughters to Instagram with this message:

"I can officially confirm I have completed the process of adopting twin sisters from Malawi and am overjoyed that they are now part of our family. I am deeply grateful to all those in Malawi who helped make this possible, and I ask the media please to respect our privacy during this transitional time."

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Madonna has previously adopted children from Malawi -- her son David Banda in 2006 and her daughter Mercy James in 2009. She also has two biological children, Lourdes Leon and Rocco Ritchie.

She artist posted a second photograph to Instagram, thanking the orphanage Home of Hope and the organization Raising Malawi for caring for her daughters for the last five years.

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We wish the singer and her children all the best.