lindsaydrunktweet.jpg Say it ain't so! We were finally having some respect for the starlet, but a source tells Us mag Lindsay Lohan they saw the troubled actress write her seemingly mature statement on her Blackberry at Magnolia restaurant last Friday, and she laughed and drank whiskey as she typed!

Lohan reportedly drafted the tweet as her assistant and a male pal "coached her on how to make it 'more personal,'" according to the spy. "Her friend would say, 'No, use 'setback,' don't say 'mistake.' They'll say you make mistakes all the time! It's better to say you're responsible. Denying it will just get everyone mad per usual." Lindsay's response? She reportedly "giggled" and had her assistant order her another Jack and Coke!

The source also says Linds even joked about drinking whiskey that night, telling her friends, "What are you gonna do?" I'm ill" -- making air quotes with her fingers. Let's hope Judge Fox doesn't read the gossip blogs! Then again, would it really make a difference with Lindsay going to jail or not?