Chrishell Stause brutally dissed Katharine McPhee after the singer went all in for Spencer Pratt for the reality star’s Los Angeles mayoral run.

The “Selling Sunset” alum commented on a TikTok video from influencer Jordy Cray, which detailed McPhee’s dating history — highlighting the “American Idol” season 5 runner-up’s scandals, including her controversial marriage to David Foster, who’s 35 years older than her.

McPhee, 42, married Foster, 76, in June 2019, becoming the record producer’s fifth wife.

Stause, 44, commented on the video, “One day she will find her real inner confidence but it won’t come until after she is disregarded enough times by the problematic men she backs.”

She added, “An insecure woman will steal your man, and give the worst advice.”

In Cray’s video, he dove into McPhee’s 2013 cheating scandal, when she was snapped kissing her “Smash” director, Michael Morris, while still married to her now ex-husband, Nick Cokas. Morris was also married at the time to Broadway star Mary McCormack, and the two are still together.

McPhee said she had “no regrets” over the scandal in a 2016 interview with Ocean Drive magazine.

“I got married really young, and then divorced,” she said.

McPhee added of dating, “This is what I should have been doing when I was 20 instead of planning a wedding. But I don’t have any regrets. All of the choices I made I learned from in a really deep way.”

Meanwhile, Stause has been vocal about not wanting Pratt to be the next mayor of LA, writing on Threads in April, “Can I please implore NO MORE reality star politicians PLEASE! I have nothing against Spencer! In fact I like him on TV! NOT in the government tho😩 CA please pull it together🙏🏼.”

Earlier this month, McPhee serenaded Pratt during a fundraiser that she and Foster threw for him at their Brentwood Park home in LA.

In video posted on social media of the event, Foster played the keyboard while McPhee sang Tina Turner’s 1989 hit “The Best” — though she changed the lyrics to sing that Pratt is “better than [LA Mayor] Karen Bass and [LA Councilmember] Nithya Raman.”

At one point, she forgot Raman’s first name, referring to her incorrectly as “Cynthia.”

Not everyone has been supportive of Pratt, 42, and his political ambitions.

His “The Hills” co-star Lauren Conrad had an awkward response when asked if she would vote for him during her appearance on “Today” last month with fellow “Laguna Beach” alums Stephen Colletti and Kristin Cavallari.

Conrad, 40, replied, “I’m not a resident of Los Angeles.”

When asked if she had squashed her beef with Pratt since the two were at odds during the MTV reality series, Conrad passively replied, “Sure.”

“You’re asking me about people I haven’t spoken to in decades,” she noted.