Madonna broke down onstage during the New Zealand leg of her Rebel Heart tour on Friday, after basically losing custody of her 15-year-old son Rocco.

The Queen of Pop burst into tears in front of her fans in Auckland and said, "There is no love stronger than a mother for her son ... If I talk about him too much I might cry." She then dedicated her song, "La Vie en Rose," to him and added, "I hope he hears this somewhere and knows how much I miss him."

Madonna told friends she has "lost the battle" after finally admitting her son does not want to live with her, reports The Daily Mail. In December Rocco left his mother's world tour and flew to Britain to stay with his father, Guy Ritchie. Despite an order from the court in New York and please from his mom, he refused to return.

Madonna, 57, is reportedly "utterly bereft" but is willing to let Rocco stay with his dad as long as she's able to co-parent from across the pond. "She won't stop fighting to try to make sure Rocco is kept safe and has what he needs," a source told the mail. "She can't understand why it has come to this. Her world has been shattered."