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Were any animals hurt in the making of this catfight?

Vegetarian Pamela Anderson, a spokeswoman for People for the Ethical Treatment of Animals, slammed Jessica Simpson on an Australian radio show for wearing a "Real Girls Eat Meat" T-shirt.

When asked on the Kyle and Jackie O Show about Ms. Simpson, who was photographed wearing the shirt in mid-June, Ms. Anderson called her a few choice (read: unprintable) names.

Ms. Simpson has drawn a flurry of criticism for the shirt, with PETA listing the "Top Five Reasons Only Stupid Girls Brag About Eating Meat" on its blog and releasing a statement that said "the woman who thought that Buffalo 'wings' came from buffalos would benefit from some good veggie brain food."

Insiders reportedly told OK! magazine that Ms. Simpson's shirt was a subtle dig at boyfriend Tony Romo's ex Carrie Underwood, who is a vegetarian and has twice been named "World's Sexiest Vegetarian" by PETA.

FoxNews.com