Madonna comes under fire for using N-word

Madonna has courted controversy once again after using a racial slur on her Instagram.com page.

The pop superstar uploaded a snap of her teen son Rocco fighting in the boxing ring on the picture-sharing website on Friday (17Jan14) alongside the caption, "No one messes with Dirty Soap! Mama said knock you out! #disn**ga."

After she was bombarded with complaints about use of the N-word from fans, she deleted the image, only to re-upload it with another risque comment.

She added, "Ok let me start this again. #get off of my d**k haters!"

It's not the first time this month (Jan14) the Material Girl has caused a stir after sharing photos of her eldest son - she came under fire over the New Year when the 13 year old and his pals posed for a snap holding bottles of alcohol.

Critics questioned Madonna's parenting skills online, prompting her to hit back, writing, "No one was drinking we were just having fun! Calm down and get a sense of humor! Don't start the year off with judgement!"

Rocco is Madonna's only child with ex-husband Guy Ritchie. She is also mom to teenage daughter Lourdes, from a previous relationship, and adopted kids Mercy and David.