Blossom star Mayim Bialik has one real big problem with Ariana Grande.

The 38-year-old took to her blog on Jewish parenting website Kveller to slam the singer over a giant billboard ad featuring Grande clad in lingerie.

Bialik claims to know nothing about Grande, who she is, or what she does—but, she DOES know she heartily disapproves of the 21-year-old having “to sell herself in lingerie”.

"There is [an ad] for Ariana Grande, and I will go ahead and admit I have no idea who she is or what she does," Bialik writes. "Based on the billboard, she sells lingerie. Or stiletto heels. Or plastic surgery because every woman over 22 wishes she has that body, I'm sure. Why is she in her underwear on this billboard though? And if she has a talent (is she a singer?), then why does she have to sell herself in lingerie?"

Although the post was titled “The Problem With That Giant Billboard Of Ariana Grande” Bialik’s disapproval falls much wider, encompassing many other stars, along with overly sexualized advertising in general.

"Then there are the Masters of Sex ads. Seriously? How am I supposed to explain those to my kids? Especially my older son who can read?" the self professed “crotchety old lady” asks.

"I just don't understand why this is what ads need to look like," she continues. "What good does it do for humanity or society? Why do I have to be OK with young women literally in lingerie on gigantic billboards? If I want to see women in lingerie, I can walk through any mall with a Victoria's Secret," adding, "Which, by the way, is a misnomer because there is nothing secret about what's being sold at Victoria's Secret."