Samantha Ronson girlfriend Venice beach beanie

Looks like as Lindsay Lohan is hanging with her new bestie Paris Hilton, Linds' ex, Samantha Ronson, as found a new girl for herself ...

The DJ has been chillin' with Erin Foster as of late and a source tells X17online, she's "flaunting" her new girl to make Lindsay jealous ...

SamRo and the blonde hottie were out together earlier this month in Malibu, grabbing coffee. That was July 3 -- coincidentally, Lindsay's birthday weekend -- when she was in Malibu. Hmmm ...

Is Erin really Sam's new girl or are the two just friends?