E!'s got the story:

PETA stepped up today, offering to pay Lohan's rehab expenses (which she insists are bleeding her dry), but with one big condition: She turn vegan.

"As you know, a crucial part of any recovery is showing charity to others. One way to do this is to be kind to animals, the Earth, and your own body. You'll never regret it," writes PETA head Michelle Cho in a letter to the actress. The critter-loving group promises to pay up to $20,000 of Lohan's $50,000 bill for her three-month court-ordered stay. She'd get $10,000 up front for eschewing burgers and milkshakes while she's still receiving treatment at the center. If she wants the remaining $10,000, she'd have to go completely vegan for one year following her release on Jan. 3.

In other news, don't give money to PETA.