An old video of Katharine McPhee’s husband, songwriter David Foster,

calling her “fat” has resurfaced — earning the ire of her fans.

In the video, McPhee — who has struggled with bulimia — is speaking on stage while Foster sits at a piano.

The background screen shows a photo of McPhee when she was a contestant on American Idol.

As the singer explains, “[People] may not know, we met 17, almost 18 years ago,

when I was a little chubby, and cheerful, contestant on American Idol.

Gesturing to the older photo of herself, McPhee, now 40, says, “Look at me smiling.”

“Oh yeah,” Foster, now 74, says. “You were fat.”

In the clip, McPhee’s hands drop to her sides and her shoulders slump while the audience laughs.

“I was a little chubby, okay?” she says.

“It’s true,” he replies. “I was just young,” says McPhee, who was 21 when she was on American Idol.