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What a difference a day makes!

After Lindsay collapsed from exhaustion last Friday morning due to her grueling film schedule, the troubled star looked bright-eyed and beautiful as she shared a sexy Twitpic from the Liz and Dick set on Monday, with the caption: "About to get my "wig" on ;) xo"

We caught La Lohan looking a little worse for the wear on the Elizabeth Taylor biopic over the weekend, where she sported a swollen face and puffy eyes, but it appears she's finally gotten a good night's rest!

But while the Mean Girls star and mom Dina have exclusively blamed her hours-long workdays for her tired appearance, the 25-year-old was out partying at the Chateau Marmont on Saturday night until 1am.

C'mon on Linds, can't you at least put off the party 'till the movie wraps?