Lindsay Lohan All Smiles At ‘Scary Movie 5′ Premiere

My, what a difference a couple of days can make.

Lindsay Lohan traded tears for smiles at the Hollywood premiere of Scary Movie 5 on Thursday, where she arrived looking noticeably happy and healthy in a knee-length black dress.

The look was a stark change from her appearance on Letterman Tuesday, during which she was brought to tears when asked about her upcoming 90-day stint in rehab, set to begin May 2.

“No, I think, to be honest, I’m the happiest when I’m working and the healthiest, and I think this an opportunity for me to, you know, focus on what I love in life,” Lohan said during the now-famous interview.  “And I don’t think it’s a bad thing. I think it’s a blessing…and not a curse.”

Scary Movie 5 opens Friday. In it, Lohan has a cameo with close pal Charlie Sheen, whom she posed with at the premiere.

Check out the best photos from Thursday’s star-studded night in the gallery, above.