Warning: Discussion of body-shaming and eating disorders.

Katharine was the runner-up on the fifth season ofAmerican Idolin 2006.

The pair met when David mentored the reality TV singing competition contestants.

Katharine McPhee in an embellished dress and David Foster in a tuxedo pose at an event

“Oh, yeah.

You were fat,” David responded while sitting at the piano.

I was just young."

David Foster playing the piano while Katharine McPhee sings on stage in a sparkling gown at a concert. A guitarist and drummer are seen in the background

“This made my heart hurt.

This beautiful girl was NEVER fat.

You don’t call your wife fat.

Katharine McPhee on "American Idol"

As a joke or serious,” one user wrote.

“Omg I cannot believe he said that????”

“That was awful.

David Foster and Katharine McPhee are smiling on the red carpet, with Katharine wearing an off-shoulder outfit and a black bow in her hair

If he can say that on stage what does he say at home?”

And this user wrote, “This shouldn’t ever be encouraged or tolerated.

David is a powerful public figure.

David Foster, Andrea Bocelli, and Katherine Jenkins at an event, engaging with three other individuals, all smiling and clapping

In 2006, Katharine talked toPeopleabout bulimia.

“I was bingeing my whole life away for days at a time.

So when I got on the show, I said, ‘You know what?

Sasha's comment: "This made my heart hurt. This beautiful girl was NEVER fat. You don’t call your wife fat. As a joke or serious." The comment received 3651 likes

I can do well in this competition.

Let me give myself a chance and just get ahold of this thing.'”

"Omg I cannot believe he said that????"

"Comment by Vanessa discussing how it is significant that she mentioned it and even more so that he agreed and commented on her weight."

Aundréa says, "Those comments are so hurtful. Hearing from anyone let alone your partner. No one should comment on anyone's body 'joking' or not."

A screenshot of a social media post by Amanda with the text: "That was awful. If he can say that on stage what does he say at home?"

Grumpycatdog's comment: "This shouldn’t ever be encouraged or tolerated. David is a powerful public figure. He’s just allowing the continuance for men to pick apart other women and other women to pick on themselves."

Katharine McPhee in a strapless gown and David Foster in a suit at the Breakthrough Prize event

Instagram comment by jackiebeat, verified account, saying "He's revolting" and has 1,669 likes

Tamra Judge's Instagram comment: "NO!!" with a facepalm emoji. The comment has 517 likes and was posted 20 weeks ago

Comment by user vera_vraw_14w: "I wonder what he says and how he treats her in private if he can be so bold and disrespectful in public." 120 likes

Instagram comment by user singsavana 21 weeks ago: "Not to mention, she's been open about having an eating disorder at that time! This is awful." 2,827 likes

David Foster and Katharine McPhee on the red carpet, David in a black suit and tie, Katharine in a glam strapless black dress with intricate jewel embellishments

Katharine McPhee waves while wearing an elegant, sparkling dress with black ribbon details at a red carpet event

Katharine McPhee on the red carpet, wearing a sparkling, embellished dress with intricate details