Who Is Lindsay’s Friend Samantha Ronson?

She’s the woman who Lindsay Lohan was caught partying with, reportedly screaming profanities at and partying with again over Memorial Day weekend, but who exactly is Samantha Ronson?

Heavily entrenched in the music world, 29 year-old Ronson is primarily known for being a celebrity DJ a la Nicole Richie’s ex, DJ AM.

Ronson has been spinning at a host of exclusive parties for years. Some of the most notable, according to her own website include Jessica Simpson’s Birthday Party and corporate events for Blender, Maxim, Playstation and ElleGirl. She also DJ’d alongside Lohan at the American Music Awards one year, but Ronson’s history with the star goes back much further.

As a singer-songwriter, Ronson’s Ashlee Simpson-esque single “Built This Way,” was featured on the 2004 soundtrack for “Mean Girls.” She appears to have been friends with Lohan for years, recently featuring in an article in Nylon magazine where she reportedly helped searched for Lohan gossip on the web and read it to the starlet.

Ronson comes from a musical family. Her brother Mark Ronson is also a world-traveling DJ who just released an artist album where he produced such stars as Amy Winehouse and Lily Allen. Their stepfather is Foreigner’s Mick Jones.