- Pop singer Madonna exposed a fan's breast during a show in Brisbane, Australia
- The episode is the latest erratic behavior on the performer's tour
(CNN)For pop provocateur Madonna, it's no longer enough to flash some nudity. She's now exposing other people's body parts, too.
The singer startled audience members by inviting a 17-year-old fan onstage during her concert Thursday night in Brisbane, Australia, and then tugging down the teen's corset top to briefly reveal her left breast.
"She's the kind of girl you just want to slap on the a** -- and pull," Madonna told the crowd before exposing the young fan. "Sorry ... sexual harassment. You can do the same to me. Good luck."
In videos posted online, the teenager appeared unfazed by the wardrobe malfunction and hugged Madonna seconds later. Afterward, she told Australian media that the episode was no big deal to her: "It was, seriously, nothing. I didn't think of it until everyone totally freaked out about it."
But some observers criticized the incident.
"Madonna is in total meltdown. She needs to cancel this tour asap," said TV journalist Piers Morgan, a former CNN host, on Twitter.
Other Twitter users wondered how people would react if Madonna were a male performer, and questioned whether what the singer did was a criminal act.
The 57-year-old pop icon, who has long cultivated a brazenly sexual persona, has not commented on criticism of the incident.
It's the latest in a rash of erratic behavior by the Material Girl on her Rebel Heart tour, which wraps up Sunday in Sydney. She has begun concerts several hours late, spewed profanity onstage and made vulgar comments about ex-husband Guy Ritchie, with whom she is locked in a bitter battle over custody of their son Rocco, 15.
In recent months, the teen has been living in London with his father. Judging by some of Madonna's recent comments, being apart from her son has been hard for her.
"There's no love stronger than a mother for her son, and if I talk about him too much, I'm going to cry," the singer told the crowd this month during a concert in New Zealand, her voice cracking. "I hope he hears this somewhere and he knows how much I miss him."
The singer also posted a statement on Instagram this week in which she thanked a fan for his support, shot down speculation that she has been high or drunk while performing and accused her critics of sexism.
"Thanks for supporting me. Too bad people don't know the art of acting and playing a character. I could never do any of my shows high or drunk," she wrote.
"And yes underlying all of this is sexism and mysongony which proves that not only do we not get equal pay bUt we are still treated like heretics if we step out of line and think outside the box! . Sexism is alive and kicking but i am #livingforlove."