The 23-year-old former child actress, whose film credits include "The Parent Trap" and "Mean Girls," has been better known in recent years for her legal woes, trips to rehab and public spats with her on-off girlfriend, Samantha Ronson.
The New York Post reported Thursday that Lohan was spotted at a Manhattan fashion show this week, taking cards with celebrities' names off of their assigned seats and throwing them on the floor, then yelling at security when they tried to get her to stop.
"Hahahaha my publicist just called me & said she heard I was in a psych ward!!!! Hahaha WHAT IS WRONG with people???? I'm working lol," People.com quoted Lohan as saying on Twitter Thursday morning. "BUT that's one I've NEVER heard about myself before! ... New ones r always interesting huh? There's SO much more going on in the world! Wake up."
Lohan's publicist told the magazine the actress is now in Texas shooting the thriller "Machete" with Robert DeNiro and Jessica Alba.