Ray Joel, the blonde beauty's daughter with rocker Billy Joel, is frequently targeted by cruel critics online, and underwent a nose job in April (10) to improve her looks and correct a deviated septum.
But Brinkley is angry at the constant stream of disparaging comments directed at the 24 year old and has called on bloggers to have some compassion.
Speaking during an appearance on new U.S. TV show The Talk on Monday (18Oct10), she said, "It's really upsetting to me, what's going on... I would read these articles on Alexa where they would criticise her for her physical appearance. Imagine a young girl, stepping out... She's exotic, gorgeous, like Sophia Loren...
"I don't care how thick your skin has become from being in showbiz, today it's such an intensity and it's really hurtful and really brings us all down. You can criticise me, but not my children. Yes, she's stepping into the spotlight but... She's amazing. I just couldn't be more pleased (at her career success)."
And Brinkley is trying to combat the cruel comments online by sending out positive vibes via her Facebook.com page.
She added, "Alexa and I are both very active on Facebook... I have a lovely team of people, I call them my gardenias because it's like a garden and they're all there to sow seeds of kindness and compassion and mutual respect for all people."