Superstar Madonna has said the custody battle over her son was one of the most “painful” moments of her life, saying she would be left “sobbing” on the dressing room floor every night before going on stage. The custody battle began after Rocco remained in London with his father after visiting the UK with Madonna on her world tour, and refusing to return to the US to be with his mother for Christmas. Madonna and Guy Ritchie divorced in 2008. The pair later reached a settlement, resolving their custody dispute over the then 16-year-old, with Ritchie’s lawyer saying that Rocco would continue to live with his father in London. “Now I am happy to say I am really good friends with my son but I couldn’t see it then.