Ashlee Simpson Ashlee Simpson

Ashlee Simpson says she is "completely disgusted" by the scrutiny over her sister Jessica's new curves.

"I am completely disgusted by the headlines concerning my sister's weight. A week after the inauguration and with such a feeling of hope in the air for our country, I find it completely embarrassing and belittling to all women to read about a woman's weight or figure as a headline on Fox News," Simpson writes on her blog under an entry titled "Since when did a woman's weight become newsworthy..."

Jessica flaunted her new body at a concert over the weekend, wearing a figure-hugging black tank top and high-waist jeans. A flurry of blog posts followed.

"All women come in different shapes, sizes, and forms and just because you're a celebrity, there shouldn't be a different standard," Ashlee Simpson writes, adding that she "seriously doubt[s]" people would make the same remarks to a wife, daughter, mother, grandmother or a friend.

"How can we expect teenage girls to love and respect themselves in an environment where we criticize a size 2 figure?" she says. "Now can we focus on the things that really matter."