The Mean Girls star caused a stir when she wrote on her Twitter.com web page in June (09), "So dark - where's jb cheater?".

The message suggested Timberlake was with another girl at Manhattan's Avenue club, behind his lover Jessica Biel's back. The couple later dismissed the rumours and Lohan denied the message was from her, insisting her account had been hacked.

But the club's bosses barred Lohan, and warned any other stars visiting the premises that they would "no longer be welcome at Avenue" if they mentioned fellow celebrities' antics on the internet.

Lohan was only allowed back in earlier this month (Oct09) after promising to behave herself, according to New York gossip column PageSix.

A source tells the publication, "She (Lohan) besieged the management with calls and e-mails to let her back in, and she promised to be on her best behaviour."