Lindsay Lohan leaving Sam Ronson's house in the Hollywood Hills (6/22)

Looks like we finally know why Lindsay Lohan sold out Justin Timberlake on her Twitter last Monday (Lindsay posted a message hinting that she saw him cheating on Jessica Biel): he cockblocked her. A witness that night at New York's AVENUE lounge told the New York Post:

"Usually Justin is pretty in control, but he was acting pretty crazy. He was drinking tequila all night. At one point, he cleared out a little space and started break dancing. He was bumping into people and spilling drinks. It was hilarious."

Our source also says that at one point, Lindsay Lohan, currently off with on-again, off-again girlfriend Samantha Ronson, tried to dance with Timberlake, but "he shooed her away."

But that didn't stop Timberlake from later cozying up to an unidentified brunette partygoer. "It definitely wasn't Jessica," laughs our source. "He was pretty drunk."

Later that night, Lohan ended up posting a thinly veiled message on her Twitter account, "where's jb cheater" — seemingly referring to Timberlake's girlfriend, Biel. The next day, she added, "Why do people cheat?" But she eventually backtracked, claiming that both messages had been sent by someone who'd hacked into her Twitter account.

Hell hath no fury like a woman scorned . . . especially the ones that date other women. Can you really blame Justin though for turning down Lindsay? When a girl that sexually confused approaches you in a club, you never know what her true intentions are -- like, does she want to bang or arm wrestle? Of course when Lindsay's with Sam, they're both one in the same. Fisting humor! Catch it!

[Flynet]