Kristen Stewart Liberty Ross ring car shots sunglasses range rover Rupert Sanders

Make that a giant rock on her middle finger! Perhaps she's sending a message to her adulterous ex-hubby for cheating on her with Kristen Stewart? Either way, she totally did the opposite of what Britney Spears did when she split from fiance Jason Trawick earlier this month...

Just five days after filing for divorce from husband Rupert Sanders, Liberty Ross was spotted out in Los Angeles on Tuesday with a huge new sparkler on her left hand. She certainly wasted no time getting rid of her wedding band and engagement ring!

Ross cited irreconcilable differences as the reason for the couple's split and she's seeking spousal support and attorney fees, while Sanders is seeking joint custody of their children Tennyson and Skyla. Last spring the news broke that Sanders, who directed Snow White and the Huntsman, had an affair with Stewart, which reportedly began when they were promoting the film.