By Kate Thomas for MailOnline and Claire Ellicot For The Daily Mail and Sam Tonkin For Mailonline Published: 20:01 EST, 12 March 2016 | Updated: 11:54 EST, 13 March 2016 Swigging tequila from a fan's hip flask, Madonna suffered another onstage meltdown yesterday as she branded ex-husband Guy Ritchie a 'son of a b***h' and begged 'someone please f*** me'. The 57-year-old singer, locked in a bitter custody dispute with Guy over their son Rocco, couldn't contain her emotions during a second mumbling show in Melbourne, Australia.Her ‘chaotic’ appearance at the Rod Laver Arena included an emotional plea to the crowd, begging, 'Somebody take care of me please. Who is going to take care of me?'Scroll down for more videos Emotional plea: Swigging tequila from a bottle, Madonna reportedly begged the crowd at Melbourne's Rod Laver Arena, 'Who is going to take care of me?' The singer suffered a second meltdown onstage after swigging from a fan's hip flask at her latest concert The 57-year-old singer, locked in a bitter custody dispute with Guy over their son Rocco, couldn't contain her emotions during a second mumbling show in Melbourne, Australia Meltdown: Madonna is seen onstage with a fan's hip flask. She was drinking in front of fans at her latest gig Madonna's ‘chaotic’ appearance at the Rod Laver Arena included an emotional plea to the crowd, begging, 'Somebody take care of me please. Who is going to take care of me?' Rocco was out cycling in London with dad Guy Ritchie on Saturday as the custody battle rages onAfter falling off a tricycle, she told her fans she had 'messed up' her songs, before joking: 'You would think it was in my DNA,' according to The Sun.Madonna seemed visibly affected by Rocco's decision to live with his father Guy in London.She reportedly said: 'If I have learnt one thing in my life, it's just to go with it. If you just laugh it doesn't hurt as much.' The Living For Love singer went on to dedicate a song to estranged son Rocco, 15, whose childhood photo was once again projected on stage.A source told The Sun: 'Being cut out of Rocco's life has hit Madonna hard and it's clear she blames Guy.'MailOnline has contacted a representative for the star for comment.Last week Madonna's representatives told a High Court judge in London that she wants to 'heal the wounds' in her dispute with Guy Ritchie over the future of their son Rocco. See more of the latest Madonna updates as she suffers her second onstage meltdown Chaotic: The 57-year-old singer told fans she had 'messed up' her songs as she powered through her biggest hits as part of her Rebel Heart world tour  Distressed: Madonna told her screaming supporters, 'If I have learnt one thing in my life, it's just to go with it. If you just laugh it doesn't hurt as much' After falling off a tricycle, she told her fans she had 'messed up' her songs, before joking: 'You would think it was in my DNA.' She is pictured during the concert at the Rod Laver Arena Emotional: Madonna seemed visibly affected by Rocco's decision to live with his father Guy Ritchie in LondonMr Justice MacDonald has been listening to submissions during private hearings in the Family Division of the court as the bitter custody battled continues.Rocco was at the hearing on Friday - but not Madonna or Mr Ritchie. All three are represented by separate legal teams.This comes after Madonna downed a vodka cocktail and burst into tears during her show at Melbourne's Forum last Thursday.Cavorting around on stage dressed as a clown, complete with pink wig and stripey stockings, the pop star tried to put a brave face on but had already kept fans waiting four hours in the rain when she emotionally dedicated her song Intervention to her estranged teenage son. Second 'meltdown' in a week: This comes after she downed a vodka cocktail and burst into tears during her show at Melbourne's Forum last Thursday Powering through: Ever the professional, Madonna managed to keep her composure in between her emotional outbursts She said she wasn't drunk but did request a cosmopolitan cocktail on stage - adding that it was the first time she had ever done so - as 10,000 miles away the legal wrangling continued over where Rocco should live.The 15-year-old sat through six hours of legal argument at the High Court earlier in the week as lawyers for his parents discussed his future.While his mother chose to press on with her concert in Australia, her lawyers said she would 'very much' have liked to be in court and a giant image of her son appeared behind her as she sang.  Rocco sat through six hours of legal argument at the High Court in London yesterday as lawyers for his parents discussed his future. he is seen above on Saturday with his father Erratic behaviour: Fans expressed their concern that Madonna was drunk as she performed in Australia. At one point she asked for a cosmopolitan cocktail to be brought on stage for her (circled) Emotional: On Thursday evening the singer displayed a huge image of her son Rocco at her gig. It came as her custody battle with ex-husband Guy Ritchie continued on the other side of the worldHer behaviour seems to be becoming erratic, as she kept fans waiting four hours before later telling them: 'I'm not making any money on this tour because of all my late fines.' It was reported that the delay was because she was still rehearsing.Despite appearing a little unsteady and slurring her words at times, she said she wasn't drunk but did have two dancers deliver her an alcoholic drink on stage.One fan tweeted: 'So far, Madonna is drunk and constantly missing cues.' Another, Karla Corpuz, said 'Madonna is drunk as f', while others suggested she was 's***-faced'.While at one point she broke down in tears over her difficulties with her son, the two-hour gig was also peppered with jokes and comedy skits. A High Court judge is considering legal issues relating to a custody dispute between Madonna and her ex-husband Guy Ritchie. The filmmaker is pictured left on his way to court and right returning home with Rocco Clowning around: Madonna is pictured on stage yesterday after making fans wait for four hours. On the other side of the world her son Rocco and ex-husband Guy Ritchie attended the latest custody battle hearing Bizarre: Despite appearing a little unsteady and slurring her words at times, Madonna (left, performing, and right, on a tricycle) said she wasn't drunk but did request an alcoholic drink on stageThe mother of four also reportedly burst into tears on stage in New Zealand this week, telling fans in Auckland: 'There is no love stronger than a mother for her son. If I talk about him too much I might cry.' Madonna, 57, is in a bitter legal battle in America and Britain with her film director husband Guy Richie.Their 15-year-old was at the High Court in London yesterday and will return today as his parents battled over his future. His mother has used child abduction laws in the Hague Convention in an attempt to force her Ritchie to return Rocco to her in New York. However, she is now applying for the application to be withdrawn.Rocco is living in London with his father and his new wife, model Jacqui Ainsley, 33. The teenager moved in last December while travelling through Europe with his mother on her Rebel Heart tour. Madonna has claimed the boy has been illegally retained and not returned as originally planned.The judge again expressed the 'fervent hope' they would settle and resolve the issues between them with an amicable settlement.Last week he said it was 'highly unfortunate and deeply regrettable' that the 'unfortunate family dispute' between the parties had arisen. In the High Court last week, a judge criticised Madonna and Ritchie, 47, for using the courts to decide where their son lives.  Support: Jacqui Ainsley, wife of Guy Ritchie and stepmother to Rocco, is pictured leaving the High Court Guy Ritchie's wife Jacqui Ainsley arrives at the couple's home in London on SaturdayMr Justice Alistair MacDonald said it was 'highly unfortunate and deeply regrettable' that they had to resort to lawyers to resolve their dispute. He reiterated those concerns yesterday, saying: 'Hopefully this family will ultimately resolve these issues between them.'In New York last week the pair were reported to have been reprimanded by Judge Deborah Kaplan for dragging their son through an acrimonious custody battle. Madonna and Ritchie married in 2000 but divorced in 2008 over his 'unreasonable behaviour'. Rocco had been living with his mother in New York.The singer, who is on tour in Australia, appeared in a one-off comedy show yesterday called Tears Of A Clown. Ritchie is currently directing Jude Law in Knights of the Round Table.The New York case will resume on June 1. Read more: