Their names are synonymous with wild parties and Hollywood night life: Britney, Lindsay, Paris. And, until Britney went into rehab, they were often photographed as a threesome.
But when Lindsay Lohan, 20, had a wild Memorial Day weekend crashing her Mercedes and getting arrested on suspicion of DUI, photos splashed across tabloids from coast to coast of the unravelling actress didn't feature Hilton or Spears. Instead, some showed her passed out in the front seat of a car belonging to a new gal pal: Samantha Ronson.
Now, inquiring minds want to know, just where does Ronson fit in the Lohan loop?
Ronson, 29, is a DJ who recently broke out onto the VIP club scene. She's already spun the decks at some of the hippest clubs across America and performed at parties for Maxim and PlayStation, at the Super Bowl, with Lohan on the American Music Awards, at Sundance and the VMAs in Miami.
So why don't most Americans recognize Ronson's name?
Jonathan Jaxson, a former Hollywood publicist and celebrity blogger (http://jonathanjaxson.blogspot.com/), says Ronson's been around for awhile, but has flown under the national radar until recently.
"She's been an indie-house DJ girl forever. She comes really from the woodwork and has risen in fame overnight," said Jaxson.
But what Jaxson calls "forever" really wasn't such a long road for Ronson -- there's already a famous DJ in the industry named Ronson, her older brother Mark. Maya Henderson, a freelance music and club critic in Chicago, says following in her brother's footsteps helped put Ronson on the map.
"Mark Ronson is a very well-known and respected hip-hop producer, which is probably how she got into the scene," Henderson said.
Despite Ronson's efforts to make a name for herself as a DJ, her association with Lohan and company has really put her on the map. So how did a relatively unknown DJ meet up with Hollywood's latest "it" crowd?
It's simple: Like Hilton, Ronson's an heiress.
Ronson, hardly a struggling artist with a rags-to-riches story, is the daughter of Anne Dexter-Jones, a renowned New York socialite. Until recently Dexter-Jones was married to Ronson's stepfather, Mick Jones of the '80s rock band Foreigner. The couple divorced in early 2007.
David Patrick Columbia, of the New York Social Diary (http://www.newyorksocialdiary.com/), describes Ronson's family background as a little bit social, a little bit rock 'n' roll.
"They really crossed into two different areas, the rock music and the social area," Columbia told ABC News. "That whole world now is so homogenized that it's all kind of one Celebrityville."
Like Hilton, Ronson grew up on the New York social scene, but unlike Hilton, she didn't break into Hollywood or the gossip magazines until recently. She's been a familiar face on the New York Post's Page Six for years.
"She's a big party girl and she's been a big party girl and a big part of that party scene for a long time," said Columbia.
While Ronson's East Coast socialite status outfitted her with the necessary pedigree for fame and fortune, it's her recently publicized relationship with Lohan that's spreading her name past New York's South Hampton society.
"It's Hollywood. If you want to be famous, get Lindsay in the picture with you and you're going to be famous," said Jaxson. "People are going to wonder who the hell is this Samantha Ronson?"
Jaxson says it doesn't take much to get noticed.