'Sorry! Sexual harassment!': Madonna shocks on tour again...

'Sorry! Sexual harassment!': Madonna shocks on tour again as she invites young female fan on stage and exposes her breast after describing. In the latest in a string of bizarre antics, Madonna humiliated a young woman by exposing her breast after inviting her on stage in front of thousands of fans. Her behaviour has become increasingly erratic during her world tour, which has been overshadowed by a highly-publicised custody battle with ex-husband Guy Ritchie over their 15-year-old son, Rocco. Concerts have been marred by mumbling lyrics, late starts and stumbling choreography. In one show she begged: 'Someone please f*** me', while swigging from a fan's hip flask. The singer shocked fans once again on Thursday night when she invited the female concert-goer to join her on stage before exposing her breast in front of the crowd in Brisbane, Australia. The humiliated brunette stood open-mouthed as the 57-year-old pop icon described her as 'the kind of girl you just want to slap on the a**', before adding: 'Oh s**t. Oh sorry, sexual harassment.' A woman renowned for her self-control, Madonna’s mental state currently appears fragile. She is evidently devastated at her estrangement from her son. After spending time with Ritchie and his new wife Jacqui Ainsley, 34, in London at the start of the Christmas holidays, the teenager refused to return to his mother in the US. In a performance last week Madonna showed images of her son on a giant projector as she swigged from a glass which appeared to contain an alcoholic drink. It was previously reported that the popstar has told friends she has 'lost the battle' and conceded her son did not want to live with her. A High Court judge has to decide whether English proceedings should draw to a close or whether he should make decisions about Rocco's welfare. Earlier this month he said it was 'highly unfortunate and deeply regrettable' that the 'unfortunate family dispute' between the parties had arisen Madonna wants to continue with one set of proceedings in New York which are due to resume in June. The show in Brisbane on Thursday night began hours behind the scheduled 9pm start time, with promoters offering fans a chance to refund their tickets. Some of those who stayed complained of lip-syncing and a lackluster effort from the pop icon, who appears to have almost given up on the final dates of her seven-month Rebel Heart tour. When she did finally take the stage, Madonna blamed the audience for being early rather than apologise for her lateness. 'It's you people that get here early, that's the problem,' she quipped. 'Stay home, do your hair and makeup, have a tequila. Roll yourself a fat one.' She also appeared to do a 'shot' during the concert, although she later claimed this was water. It was during this late-starting show that Madonna invited an attractive brunette fan to join her on stage. 'She's the kind of girl that you just want to slap on the a** and pull...,' she said as she tore down the woman's corset-style top. She added: 'Oh s**t.' 'Oh sorry, sexual harassment.' 'You can do the same to me if you like... you want to make my hole big again?' she continued, gesturing towards her nether regions. Meanwhile, documenting her return to Australia for the first time in 23 years, Madonna has announced that she will film her Sydney concerts at the Olympic Park this weekend. These are the final two shows of her seven-month Rebel Heart world tour where the artist has performed 80+ shows in over 20 countries. Throughout her global stint, Madonna has pulled several actors, comedians, fans, fellow musicians and even a news anchor to the stage for a special dance as her Unapologetic Bitch. This weekend in Sydney Madonna will choose a few fans as her 'Unapologetic Bitches' - all which will be documented by the taping this weekend.