brandon-davis-petra-ecclestone.jpgPetra Ecclestone billionaire Brandon Davis heir heiress Chateau Marmont

Brandon Davis spent the better part of Friday with his new pal Petra Ecclestone, and whether it was going to Madeo or getting spray tans, they seemed to be joined at the hip! Mischa Barton's ex-boyfriend was later spotted chilling with Petra and her entourage at the Chateau Marmont, and after taking off from the Hollywood hot spot, the group headed to a private house party in the Hills. What a day!

So what's her sister Tamara been up to? She's been busy modeling the latest lingerie collection by Ultimo, and we have to say, she certainly looks like a million bucks! Click after the jump to see another hot shot of Tamara...