Madonna's contentious custody battle with ex-husband Guy Ritchie over their 15-year-old son Rocco seems to be taking its toll.<br />The Rebel Heart singer mentioned Rocco during a Friday night tour stop in Auckland, New Zealand, according to video obtained by TMZ, and became visibly overwhelmed.<br />"There's no love stronger than a mother for her son, and if I talk about him too much, I'm going to cry," she told the crowd, before saying she would dedicate her next song, "La Vie en Rose," to Rocco.<br />"I hope he hears this somewhere and he knows how much I miss him," she said.<br />Madonna, 57, and Ritchie, 47, have spared for months over their son.<br />At a New York Supreme Court hearing on Wednesday, the exes' lawyers, Rocco's court-appointed attorney and the judge agreed that the 15-year-old will remain in London with his father, as they work toward settling the custody dispute out of court.
