The outspoken comedienne insists she feels sorry for the 'Mean Girls' star - who has been sentenced to 90 days jail for violating her probation for driving under the influence -despite recently branding her "dumb" and a "party skank" and says she is appalled at the conduct of the actress' parents Dina and Michael Lohan.
Joan said: "If I were Lindsay's parents, I wouldn't be on television discussing it, I wouldn't be going on to Joan Rivers for doing a stupid joke on her blog, I would be taking her to rehab and a rehab where you don't get your nails done.
"I think it is so sad, the road that this girl is going down. It's appallingly sad. She better get into rehab and better get into it fast.
"Lindsay, I am pleading with you. you're beautiful, you're smart, you're talented. Go to rehab, you're young! My daughter Melissa and I will pay for your rehab!"
Joan also hit out at the actress' ex-girlfriend Samantha Ronson - who blasted the 77-year-old comic for making jokes about her former lover - and urged the DJ to do more to help Lindsay.
She added to US TV show 'The Insider': "I am so sorry for Lindsay Lohan. I am so appalled that these people are coming out of the woodwork upset that I did a joke about her. I think they should worry about Lindsay Lohan.
"I think this ex-girlfriend, this DJ - I thought it was a skinny boy when I first saw the picture - came out doing jokes about me and Melissa. Why not worry about Lindsay Lohan? That girl is going to be dead in 10 years if somebody doesn't take care of her."
"I suggest that this skanky little girl not worry about the jokes; worry about Lindsay. I find this insane that they are all feeding off of Lindsay. Maybe somebody should take care of Lindsay."
Under the terms of her sentence, Lindsay must enter an in-patient rehabilitation program after her release from prison.
The 24-year-old star is due to begin her prison term on July 20.
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