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Another said: "There's way too much sugar in that. I wouldn't give that to my kid. Too young."

But other parents were quick to defend her. Samanthaglenn commented: "Children are usually easy to please. Nutella toast is the bomb, my kids love nutella. And your child is adorable."

Someone else hit back: "I gave my child Nutella when she was only 6 months and she's perfectly fine. I don't understand how people like you start sh** like this just for attention.

(Image: Instagram/kellyclarkson)

"You both should be ashamed of yourself because only you two would think that she's abusing her child."

One critic later defended their opinion, saying: "I made one comment saying that's too much sugar for a toddler. I've been getting attacked this entire time for saying that there's 21 grams of sugar in only 2 tablespoons of Nutella.

"It's intended for adults with a 2,000 calorie diet. Toddlers aren't supposed to eat up to 2k calories so think about how much sugar in that snack is doing to a small child.

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"I never said she feeds it to her all day, i never said it's child abuse, or that Kelly is a bad parent. I am getting defensive because these so called moms are saying it's ok to have this whenever, let them be kids and have soda, and sweets like this.

"Wtf. This is the point, I'm upset because I feel sad for the kids."

Clarkson, who shot to fame when she won the first season of American Idol in 2002, has struggled with her weight since having children.

Some of the comments appear to be aimed at her weight gain.

Last year Nutella fans were shocked when a photograph claiming to show the deconstructed ingredients was posted on social media.

Nutella is actually made up of more than 50% sugar - higher than it looks to be on the image.

The official website lists the sugar content as 56.8g per 100g serving, or 56.8%.

Other ingredients include skimmed milk powder, hazelnuts, cocoa powder and the controversial palm oil, which reports have linked to cancer.

The product's makers, Ferrero, hit back at the claims and stressed that Nutella is safe.

A spokesperson for Nutella told Mirror Online: "We don’t disclose the full proportions of the ingredients in Nutella as our recipe is unique and we wish to safeguard this.

"The product’s label provides simple and clear nutritional information per 15g portion, or two heaped teaspoons, as well as per 100g.

"The ingredients are also listed on the Nutella website.

They added: "One of Ferrero’s core nutritional beliefs is that small portion sizes help people to enjoy their favourite foods in moderation.

"The labelling on all our products enables consumers to make informed choices and helps ensure that Nutella can be enjoyed as part of a balanced diet."