Sam Ronson Defends Lindsay Lohan After Joan Rivers Diss

 Astrid Stawiarz, Frazer Harrison, Joe Scarnici / Getty Images

It looks like Samantha Ronson still has a soft spot for her ex Lindsay Lohan.

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Joan Rivers mocked Lohan, who was just sentenced to 90 days in jail, in a series of Tweets. "Lindsay Lohan is so dumb. Her idea of being sworn in is cursing at the judge," said one, a clear reference to Lohan's F-word manicure.

Said another, "I was just reading about the new Lindsay Lohan diet, which is all liquid. 80 Proof." The actress is going to jail for violating probation on two 2007 DUIs. Rivers, 77, also quipped, "Lindsay Lohan said she wouldn't mind being under oath because she thought Oath was a Norwegian ski instructor." (Rivers also had a few biting words for judge Marsha Revel, who sentenced Lohan.)

Ronson, 32, stood up for Lohan, from whom she split in April 2009.

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"Hey Joan Rivers," she Twittered. "You have collagen older than Lindsay, pick on someone your own age, oh wait I guess people that old can't hear."

Lohan appreciated the support. She re-Tweeted the message Saturday morning, and added, "thank you. ;)"

The exchange was much more civil than one of their recent run-ins, in which Lohan pitched a glass at Ronson at a Hollywood club. Retorted Ronson after, "She's an angry human being."

Meanwhile, reports she's hired a new lawyer, Chicago-based Stuart V. Goldberg, to appeal her jail sentence. Her former lawyer, Shawn Chapman Holley, issued a scathing statement slamming Lohan's sentece and quit the same day.

But Lohan's New York-based attorney, Stephanie Ovadia, says the family is still searching. (Dina told Entertainment Tonight she spends hours a day going over legal papers herself to help mount a defense.)

"No attorney has been retained by the family at this point," she told

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