Lindsay Lohan fended off attacks earlier this week, after her thin frame became the focus of attention.
And now, her mom is stepping up to defend her daughter.
"I don't know why people care about other people's weight. I think they should look in their own mirror and stare at themselves," Dina told Billy. "I'm a mom. If I see my daughter a little thin, I say, 'Eat more McDonald's.'"
Earlier this week, Lindsay also referred to the fast-food chain in defending herself from comments in the media suggesting she and girlfriend Samantha Ronson were in competition to see who could become thinner.
"I eat. I had my Big Mac yesterday from McDonald's," Lindsay told Us Weekly on Monday. "I eat as much as I always have."
Still, Dina says it wouldn't kill her daughter to add a few pounds.
"I told Lindsay I think she's a little thin," Dina admitted. "But we go through this every couple of months. My daughter is happy and healthy and that's all that really matters."
Dealing with tabloid attention is certainly nothing new for Dina and her family and she said it's something they've learned to ignore.
"We try to keep it at bay and not really read it or engage in it because it's just other people's opinions," she continued. "We've got hit pretty hard in the past, so we don't really go there."
Related Content from AccessHollywood.com:
PLAY IT NOW: T.G.I.F. Lindsay Lohan's Weight Problem? (Feb. 16, 2009)
PLAY IT NOW: Access Extended: Lindsay Lohan On The Record, Part I