In Mean Girls, who has breasts that tell when it's raining?

In the movie "Mean Girls," the character Karen Smith, portrayed by actress Amanda Seyfried, humorously claims to have a unique ability: her breasts can supposedly predict when it's raining. This is part of the comedic and exaggerated elements in the film. Karen Smith is one of the "Plastics," a popular clique of high school girls, and her character is known for being naive and entertainingly oblivious at times. The reference to her breasts "predicting" the weather is a humorous and memorable moment in the movie.