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...

If your little sister buys the most expensive home in America and then has an insanely extravagant wedding - complete with a Black Eyed Peas performance - you'd probably want to steal the spotlight back too. And that's just what Tamara Ecclestone is doing!

The eldest daugther of Formula 1 billionaire Bernie Ecclestone and Croatian model Slavica is now starring in her own reality show - and shopping for a home as over-the-top as Petra Eccelstone's recently acquired (and paid for in cash!) $85 million Spelling mansion.

Tamara Ecclestone: Billion Dollar Girl will premiere November 4 in the U.K., and she's been in talks with major Hollywood studios to promote it in the U.S.

She should have no problem with that! Not only does she have Hollywood practically salivating over her no-holds-barred lifestyle, she's spending over $1.5 million on Amazonian rock crystal to build a luxurious bathtub in her London home.

Tamara confirmed that the price tag is no rumor, telling the U.K.'s Daily Mail:

"No, it’s completely true. They’ve gone to find this crystal which will be turned into my bathtub. It’s costing £1 million because I’ve got to reinforce the floor and I’ve had to pay for everyone’s travel and the hauling back and polishing of the crystal. But I spend a lot of time in the bath so it’s worth it."

Ironically, this is a girl who claims she was brought up grounded, saying her father raised Tamara and Petra to "appreciate money and not to take it for granted."

We would appreciate being able to buy a $1 million bathtub too. This is so a reality show we're watching if it comes to America - Tamara has Hollywood written all over her already!

Dressed to the nines in a body hugging Herve Leger dress and sky high Christian Louboutin heels, Billion heiress Tamara Ecclestone arrived at club Voyeur in Hollywood to meet up with new pal Brody Jenner Thursday night.

The Formula 1 heiress and her younger sister, Petra Ecclestone, have been making a splash in LA ever since newlywed Petra purchased Candy Spelling's mansion for $85 million, last June. It appears the sisters have been taking over the Hollywood scene ever since.

Do we hear a reality show coming soon?

Billionaire heiress Petra Ecclestone and new husband James Stunt grabbed dinner at Madeo alongside sister Tamara and her beau Omar Khyami.

Both sisters flaunted their sexy and tanned bodies. Petra also couldn't help but flash her enormous wedding ring. Talk about blingtastic!

Makes you wonder who footed the dinner bill? We have a feeling mega-rich Bernie Ecclestone doesn't mind shelling out the dough. Thanks daddy!

Apparently $85 million can buy you a home, but maybe not tact.

Petra Ecclestone is reportedly stripping the incredibly expensive home she bought from Candy Spelling, according to the U.K.'s Daily Mail.

The British Formula 1 heiress is said to be taking out all of the old-fashioned chandeliers, fireplaces, gold fixtures and wallpaper and replacing them with more modern designs.

Ecclestone also brought antique dealers into the Holmby Hills mansion to bid on any items they liked. That's one way to get rid of things - and get some of your investment back! After all, the 22-year-old supposedly borrowed $82.4 million (as in, nearly the entire bid) from her mother Slavica in order to buy the home.

See more pictures of the Spelling estate - considering the most expensive home in the United States - below.