Kelly Clarkson, 32, was appearing on The Graham Norton show when Katie Hopkins tweeted cruel insults about her weight.

Katie, 40, wrote during the performance: “Jesus, what happened to Kelly Clarkson? Did she eat all of her backing singers?”

“Happily I have wide-screen. #grahamnorton.”

Fans of the singer pointed out that Kelly had recently become a mother, but the outspoken Celebrity Big Brother star continued, ranting: “Darling, if you had a baby a year ago, that is not baby weight. It is fat. Quit calling it cute names to make yourself feel better.

“Baby weight, puppy fat, muffin top. We're so weak willed we have to make up cute names for fat.”

Fans quickly jumped to Kelly’s defence, with one replying: “@KTHopkins Thankfully Kelly Clarkson probably doesn't have a clue who you are. You're a nobody compared to her. And that's what matters', were the words of another Twitter user.”

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