Lindsay Lohan LLohanCrazy021809_00.jpg Party until 4:30am, of course!

After the Beverly Hills Police Department issued a $50,000 warrant for Lindsay Lohan's arrest yesterday, the starlet went to Chateau Marmont to get her party on, and she didn't get back to Sam's until 4:30am!

Calls to Lindsay's attorney and rep were not immediately returned, but sources tell X17online that Lindsay may not have to turn herself in - that this is likely an issue her legal team can sort out. Okay, so what's going on here?!

Stay tuned - we'll give you the latest details as soon as we get 'em!