She's been known to go au naturel before.
But Lourdes Leon, Madonna's 21-year-old daughter, seemed to be taking it to a new level on New Year's Eve as she posed in a strappy top showing off excessively hairy armpits.
Her mother was uploading Instagram posts about her love for her children, and one photo saw her cradling Lourdes' face.
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Her first born: Just before midnight on New Year's Eve, Madonna, 59, posted a photo to Instagram showing her cradling the face of her 21-year-old daughter Lourdes Leon
Lourdes threw her arms back in the photo to embrace her mother, unfortunately exposing her armpit hair in all its glory.
Meanwhile, the blonde pop superstar kept her hands on her raven-haired daughter's chin as they posed for the camera.
'We are Ready For You 2018! ♥️,' Madonna captioned the snap, not making any reference to Lourdes' decision not to shave.
Lourdes sported a wide grin with scarlet coloring on her lips in the shot, with Madonna holding one gloved hand and one naked hand around her child's chin.
Madonna wore a revealing black top with sheer nude panels and a jaunty black hat.
Lourdes is her eldest child and her