Photos of a curvier Simpson performing last week in Florida have been plastered all over the Internet, leading to a slew of nasty comments about her weight.
Lachey, who was divorced from Simpson in 2006 after four years of marriage, defended her when asked about the criticism Friday night at a Super Bowl party he co-hosted with NASCAR driver Jimmie Johnson.
The New York Post ran an editorial cartoon mocking Simpson, and Saturday ran a photo of her performing Thursday night in Charlottesville, Va., wearing a black leather ensemble. The Post described the outfit as a "waist-length jacket over her skin-tight pants and wide belt."
Lachey joined a growing list of celebrities in defense of Simpson that includes super model Heidi Klum, curvy reality TV star Kim Kardashian and Simpson's sister, Ashlee Simpson-Wentz.
"I am completely disgusted by the headlines concerning my sister's weight," Ashlee wrote on her blog this week. "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.
"All women come in different shapes, sizes, and forms and just because you're a celebrity, there shouldn't be a different standard."
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