Pop singer Jessica Simpson has taken to the internet to chastise Perez Hilton - accusing the celebrity blogger of posting vulgar comments about her one-year-old nephew, Bronx.

The singer's younger sister, pop star Ashlee Simpson-Wentz, and her husband, rocker Pete Wentz, celebrated their baby boy's first birthday on Friday - and Hilton, real name Mario Lavandeira, used his web page to poke fun at the family.

He wrote: "It's been one year since A**lee pushed Bronx Mowgli through her vayjayjay (vagina) and it's all the family is talking about."

Hilton also called the tot a "poor lil' thing" who "doesn't stand a chance."

However, 29-year-old Aunt Simpson wasn't amused by the birthday acknowledgement, and has stepped out in defense of her family.

In a posting on her Twitter.com page, she writes, "Does Perez Hilton...whatever his name really is... have no heart at all? Don't ever attack my family again. Sad to know u (sic) hate so deeply. Sad 4 U (sic)".

Image © AP Photos

(This news article provided by World Entertainment News Network)