Holy Shhh -- Lindsay Lohan & Lily Get Hers and Hers Tats

After hanging out at the Chateau Marmont on Wednesday, new gal pals LiLo and Lily stopped at a late-night tattoo parlor and copied RiRi by getting matching hers and hers "shhh..." ink on their index fingers.

Bet Samantha Ronson isn't gonna be quiet about this.