Lindsay and Ali Lohan's Sisterly Shopping Spree

Doing her best to keep busy as she complies with her probation terms, Lindsay Lohan joined up with little sister Ali for a week-ending retail romp in Beverly Hills on Friday (June 4).

Sporting high ankle leather sandals that covered up her court-ordered alcohol-monitoring SCRAM ankle bracelet, the "Georgia Rule" babe and her darling sis hit up the popular Switch Boutique.

The Lohan gals busily browsed the racks in search of the perfect duds, with Ali looking quite perturbed by the paaprazzi in-store presence.

Meanwhile, LiLo was busy thinking about the past, as she took to her Twitter account to vent her displeasure over the E-Trade commercial from earlier this year in which she filed a $100 million lawsuit against.

The troubles actress tweeted, "Was just thinking about how mean&unecessary that etrade commercial was of my during super bowl :("

Nonetheless, the latest reports tell that Miss Lohan has been keeping up with all of her court requirements - which should bode well when she hits the courtroom next month for a probation violation hearing.

Enjoy the pictures of Lindsay Lohan out shopping with Ali (June 4).