Heather Dubrow is throwing another over-the-top party at her mansion – because, of course, she is – when who do we spy but singer Richard Marx and his wife actress Daisy Fuentes walking in.

And if Marx is on “The Real Housewives of Orange County,” you know he’s not going home until he’s delivered a command performance for Heather.

Our hostess, right on cue, shares the story of the time a Marx song taught the freshly dumped Heather that one day, as God was her witness, she would love again.

“I remember crying in the car, and this song came on the radio, and I cried more,” Heather tells her guests, who included housewives Gina Kirschenheiter and Jen Armstrong, and their respective dudes.

“And I thought, ‘My gosh, I hope someday I find someone in my life that will love me like that,” she says. “If I could go back and tell my 18-year-old self, not only are you going to find that person, that guy on the radio is going to become a very good friend of yours.”

Marx then picks up an acoustic guitar that just happened to be lying around in the Dubrow manor and sings “Right Here Waiting” while Heather beams and all her guests make ooh-and-ahh faces.

Well, all except Gina, who is unimpressed.

“I know Richard Marx because my dad used to play his music,” she tells the camera. “No offense, Rich.”

Of course Gina wouldn’t be interested in Marx. Just weeks after she admitted to having erotic dreams about Heather’s massive walk-in closet, she’s still falling deeper in love with Heather’s house.

In particular, the basement party room which, let Gina tell you, is like no basement she’s ever seen.

“On Long Island, the basements have, like, your old gym equipment or a tenant down there,” she says in a confessional.

“This is cool down here,” Jen later says to Gina.

“Yeah, it’s like the coolest basement I’ve ever been in,” Gina replies.

Related links

The Real Housewives of Orange County: Nearly naked in Shannon’s pool
The Real Housewives of Orange County: Toasting women’s underwear at the table
‘The Real Housewives of Orange County’: Incredible edibles make lunch a bunch of fun
‘The Real Housewives of Orange County’: ‘My mind’s blown,’ Gina says of a Noella’s risqué revelation
The Real Housewives of Orange County: ‘My spray tan sweated off!’

The soiree is a wrap party for Heather and Terry Dubrow’s new reality TV show, “7 Year Stitch.” It’s a show in which Heather and Terry, a plastic surgeon, give struggling couples “internal and external makeovers” and try to “stitch them back together.”

The rest of this week’s episode is taken up with Jen throwing a party of her own to introduce to friends and family the new brain-scanning treatment she’s added to her medical practice.

It’s something she calls “customized neuro-cardiac TMS” and, no, we aren’t entirely sure what that means.

Jen is worried that housewife Noella Bergener will show up and rain on Jen’s parade, which, fair, Noella tends to take over a room. So she calls her up and makes Noella promise to be good or else stay home, which, rude!

Jen gives a presentation that begins with, “Let’s look at some brains!” and runs at least 15 minutes longer than the 10 minutes she promised she’d take, a fact the editors hammer home with one or two shots of guests yawning.

Gina has brought her ex-husband Matt – don’t ask – and his new girlfriend Britt, who’s a dead-ringer former housewife Kelly Dodd. The resemblance results in doubletakes at different times from Noella, Shannon Storms Beador, and Jeana Keough, an original housewife.

Housewife Emily Simpson volunteers to get her brain scanned, and 45 minutes later, still with the weird-looking scanner on her head, has been forgotten by the rest of the party.

“Can I get a glass of prosecco and a chicken wing?” she calls out to no avail.

Elsewhere in this episode, Emily has a couple of sweet moments.

First, when her family and in-laws witness her husband Shane getting sworn into the California Bar. And later, she meets a man who’d been wrongly imprisoned for 15 years before he was exonerated.

Emily, an attorney like her husband, is volunteering with the California Innocence Project after having seen TV shows on the wrongly convicted and efforts to restore justice.

“So really, binge-watching TV has led me to be a humanitarian,” she says.

And Noella goes out to dinner with her mother Nancy.

“This was lovely,” Noella tells her mother. “I need to surround myself with bad (women), and you are the queen of that.”

Nancy makes a face as if to say, What did you just call me?

“It’s a compliment,” Noella assures her.