Mayim Bialik is clearly not a fan of Ariana Grande or her recent Billboard advertisement -- the "Big Bang Theory" star recently criticized the pop star for revealing too much skin.

On Sept. 12, the 38-year-old actress and mother, who claims to be "socially conservative" even though she is "a bleeding heart liberal," did not hesitate to attack the 21-year-old singer in a blog titled "The Problem with That Giant Billboard of Ariana Grande" on Jewish parenting website kveller.com. 

"There is one for Ariana Grande, and I will go ahead and admit I have no idea who she is or what she does," she wrote. "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."

Bialik then questioned why Grande chose to wear such a racy ensemble for the shoot. "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?" she continued. "I mean, I know that society is patriarchal and women are expected to be sexy and sexually available no matter what we do in society, but I guess now I need to explain that to my sons?"

Moreover, Mayim Bialik made her point loud and clear: "I don't want my kids learning about sex from billboards." However, it was quite inevitable for her to receive some harsh responses from Ariana Grande's fans. She then took to her Twitter account on Sunday, insisting that she does not have anything against the "Problem" hit maker: