David Foster said his wife, Katharine McPhee, was “fat” when she was on “American Idol” in a resurfaced video.Getty Images for Elton John AIDS Foundation

A video of David Foster saying his wife, Katharine McPhee, was “fat” when she was on “American Idol” has resurfaced online — and fans are fuming.

“You may not know we met 17, almost 18 years ago when I was a little chubby and cheerful contestant on ‘American Idol,’” McPhee, 40, said into a mic while standing on a stage during a joint performance with Foster, 74.

The singer pointed to the jumbo screen behind them, which flashed a picture from Season 5 in 2006. At the time, she was competing for the coveted title, while Foster served as a mentor for the contestants.

“You may not know we met 17, almost 18 years ago when I was a little chubby and cheerful contestant on ‘American Idol,’” McPhee said during a performance with Foster.TikTok/@jordycray

The singer pointed to the jumbo screen behind them, which flashed a picture from Season 5 in 2006.TikTok/@jordycray

“Oh, yeah — you were fat,” the music producer blurted out nonchalantly while sitting at a grand piano.

McPhee tried to make light of the moment by explaining, “I was a little chubby, OK? I was just young.”

But internet users blasted “shallow little man” Foster for the “totally ignorant” and “disrespectful” remark.

At the time, McPhee was competing for the coveted title, while Foster served as a mentor for the contestants.Getty Images

“Oh, yeah — you were fat,” the music producer blurted out nonchalantly.WireImage

“Bad enough she called herself chubby, but then I nearly threw my phone,” one person commented beneath the clip, which went viral on Instagram, TikTok and Reddit.

“He’s revolting,” someone else chimed in, as another added, “I wonder what he says and how he treats her in private if he can be so bold and disrespectful in public.”

“If you look up ‘narcissist’ in the dictionary, guess whose photo you’ll see?” one critic quipped, while yet another dissenter lamented, “This made my heart hurt. This beautiful girl was NEVER fat. You don’t call your wife fat. As a joke or serious.”

McPhee tried to make light of the moment by explaining, “I was a little chubby, OK? I was just young.”Getty Images

But internet users blasted “shallow little man” Foster for the “totally ignorant” and “disrespectful” remark.davidfoster/Instagram

A few netizens also pointed out, “Not to mention, she’s been open about having an eating disorder at that time! This is awful.”

Shortly after being crowned the runner-up of “American Idol” Season 6, McPhee revealed that she secretly struggled with bulimia until being chosen for the talent show in the fall of 2005 prompted her to seek help.

She and Foster didn’t begin dating until 2017; she went on to become his fifth wife in June 2019.

A few netizens also pointed out, “Not to mention, she’s been open about having an eating disorder at that time! This is awful.”FilmMagic for Fox Television Network

McPhee struggled with bulimia until being chosen for the talent show in the fall of 2005 prompted her to seek help.Christopher Polk

The musically gifted couple then welcomed their 3-year-old son, Rennie, in February 2021.

The following month, McPhee admitted that her pregnancy was triggering for her, explaining that “the biggest challenge” of the experience “was really the body-issue stuff.”

Reps for Foster and McPhee did not immediately respond to Page Six’s requests for comment.