Lindsay Lohan is responding to allegations that she Twittered seeing Justin Timberlake cheat on girlfriend Jessica Biel earlier this week.

"So dark -- where's jb cheater?" are the words that appear on Lindsay's Twitter page, reportedly referring to Justin Timberlake's dancing at NYC hot spot Avenue on Monday night with another girl. (The post allegedly has an accompanying dark photo that proves the incident occurred.)

But Lindsay is denying that she posted the photo and wrote those words.

"I would not discuss my personal life, let alone someone else's, on the internet!" Lindsay tells Life & Style. Lindsay does confirm, however, that it is her Twitter page but says she didn't write those words. So was she hacked? "Clearly! Twitter needs to fix their s--t. I didn't write 'jb cheater!' What does that even mean? It's annoying."

And what does Avenue have to say about all this? "Celebrities that twitter about other celebrities will no longer be welcome at Avenue," says an Avenue Lounge spokesperson.

Credit: Retna