Taking a break from the set of "Labor Pains", Lindsay Lohan and Samantha Ronson went shopping for diamonds at Cartier in Beverly Hills on Wednesday (July 2).

And this was no everyday shopping spree for LiLo, as the "Mean Girls" starlet is celebrating her 22nd birthday today!

Looking chic in her black leggings, a summery top and strappy black heels, Miss Lohan checked out the posh store's selection before rounding up her BFF and making a break for the exit.

Meanwhile, insiders tell that the birthday girl will be holding a private party at Teddy's at the Hollywood Roosevelt Hotel later on in the evening - with DJ AM taking over spinning duties.

Gossip Girls

Enjoy the pictures of Lindsay Lohan birthday shopping at Cartier with Sam Ronson (July 2).

Photo Credit: SplashNewsOnline.com