Lindsay Lohan: Why I've Been Out So Late

Explanations? Or excuses?
Through Twitter, Lindsay Lohan has issued disclaimers when the paparazzi have caught her out in the wee hours at – or near – clubs.
Just what she's been doing post-rehab is important since the actress, 24, needs to put her best face forward in her ongoing court appearances for her grand theft case, stemming from the $2,500 necklace she's accused of stealing.
Already on probation in a DUI case, the last thing Lohan needs is for the judge to see her as an unreformed party girl. A violation of her probation could send her back to jail.
Lohan's nocturnal activities began on Grammy night when she attended a Nivea bash in Beverly Hills. "She didn't stay long at all, but the party started late at night," a source tells PEOPLE.
Lohan was next spotted leaving Hollywood's Roosevelt Hotel with Samantha Ronson after midnight Thursday.
She later Tweeted, "I was just at roosevelt to meet Samantha and say happy birthday to a friend. i take my sobriety seriously. please dont believe this accusations. i know the rules and i wouldnt risk probation."
Then on Friday night, Lohan hit up an NBA All Star party at Station Hollywood where a source says, "She arrived on the late side with an entourage of six."
The next night, Saturday, Lohan took in a show at Hollywood's Hotel Café where her pal Ferras performed.
After getting photographed again, she wasted no time Tweeting why she was out and about.
"Went to see my friend @ohferras perform and was talking to a future costar – just to be bombarded by paparazzi," Lohan wrote. "So much for being normal – im now winded and headed home."
The purpose of Lohan's hearing Wednesday is to see if the theft case can be settled with a plea deal. The L.A. County Probation Department is expected to submit a report on Lohan's probation status. If a plea cannot be reached, a new court date will be set.
Lohan's mom Dina, sister Ali, and brother Michael Jr. have recently flown into Los Angeles, reportedly to be by her side for the court appearance.
"Lindsay wants her mom here because she is a bit bored," a source tells PEOPLE. "She is also nervous about court this week because her lawyer can't guarantee that she won't have to do jail time."