Dear paparazzi, you are cordially not invited to Miss Lindsay Lohan's birthday bash! Stay on the beach, bitches!
Lindsay Lohan soberly celebrated her 21st bday with fam, friends and once and former boytoy -- but photogs were not allowed to get near the fun -- forced instead to stake out the sand while Lindz blew out her candles.
Paparazzi started assembling seaside at the house around 2:00 PM and were present until the last presents were unwrapped -- around 2:15 AM. A paparazzo's work is never done.