'Blonde Ambition!' Madonna gives her son Rocco, 15, a girly makeover as they enjoy some quality family time backstage during her Rebel Heart Tour

She's the original pop superstar with a career spanning four decades.

But Madonna is also a devoted mother to children Lourdes, 18, Rocco, 15, David, 10 and Mercy, nine, flying her brood out to join her during her Rebel Heart world tour.

The 57-year-old singer has clearly been having a blast with her kids behind the scenes, offering fans a sneak peek at what goes on backstage on Monday when she uploaded a silly snap of her eldest son Rocco with his hair in bunches.

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New look: Madonna uploaded this behind-the-scenes snap of her son Rocco on Monday, showing the 15-year-old star with his hair in bunches 

New look: Madonna uploaded this behind-the-scenes snap of her son Rocco on Monday, showing the 15-year-old star with his hair in bunches 

The teen - whose father in filmmaker Guy Ritchie -  will no doubt be left red-faced when he realises his mum has shared the picture with her with her 4.7million Instagram followers.

Rocco, wearing a baggy purple top over a white T-shirt, can be seen showing off his unconventional hairstyle as his mother peers over his shoulder.

'Blonde Ambition! #rebelhearttour', Madonna jokingly captioned the image, referring to her iconic 1990 Blond Ambition World Tour.

Centre of attention: Madonna's nine-year-old daughter Mercy was enjoying the backstage preparations on tour

Centre of attention: Madonna's nine-year-old daughter Mercy was enjoying the backstage preparations on tour

Another candid snap from the extended world tour shows her adorable daughter Mercy gazing up at her mum as she joins in the backing dancers' group preparations backstage.

'Battle cry before each show TIL WE DIE‼️‼️', Madonna captioned the image.

The kids have been loving every moment on tour with the Music hit-maker, who brought David out onto the stage to be serenaded by fans when he turned 10 last Thursday.

Birthday boy: Madonna brought her son David out onto the stage last Thursday so her fans could wish him a happy birthday 

Birthday boy: Madonna brought her son David out onto the stage last Thursday so her fans could wish him a happy birthday 

Madonna recently confessed her eldest daughter Lourdes was mortified by her raunchy lyrics and suggestive stage costumes.

Speaking on the Today show, she explained: 'It just goes over Rocco's head. He's like, "Oh, mom. Mom's being mom."

'The other little kids don't really - they're not tuned into that frequency yet. Lo is horrified by all of it. She just wants me to be her mom.'

'Horrified': Madonna recently admitted that Lourdes (left) cringes at her mother's raunchy stage costumes and explicit lyrics 

'Horrified': Madonna recently admitted that Lourdes (left) cringes at her mother's raunchy stage costumes and explicit lyrics 

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