Ryan Dunn

By DAILY MAIL REPORTER

Getty wiggy: Paris Hilton and Brooke Mueller grabbwed pizza in disguise in LA today while filming their new reality show

They seemed like any two friends having a laugh.

Paris Hilton and Brooke Mueller slapped on wigs for fun as they filmed scenes for Paris' new reality show in Los Angeles today.

Clutching plates of pizza and cans of Coke, the two women seemed to be having a blast.

Dressed in a knee-length black coat and black riding boots to match her wig, 29-year-old Paris could hardly stop giggling.

While Brooke, 33, chose to go redhead with her hairpiece.

It's surprising Paris would find fake hair so funny considering her latest interaction with the hair extensions company who sued her for $35 million.

They accused her of wearing competitor's extensions and of being in breach of her contract by going to jail in 2007.

Is that you? Paris (L) and Brooke (R) seemed to really enjoy dressing up in wigs for the cameras

But today it's been revealed Paris has launched a counter suit against Hairtech International for $3 million.

The heiress claims she was 'professional and honorable', according to U.S. website TMZ.

Paris also claims the head of the company wrote her an email after a shoot, praising her, saying: 'Hey Paris. I know it was a long day, but baby you Rocked.

'Just from the takes I saw this is going to be one hellava commercial, you were genuinely amazing.'

Pretty in pink: Paris looked every inch the socialite as she emerged from her pink Bentley clutching her chihuahua
But for now Paris will continue concentrating on working hard to make her reality show a success.

While shooting more scenes yesterday, the glamorous blonde was spotted climbing out of her huge $135,000 customised Pepto Bismol pink Bentley clutching her latest Chihuahua puppy along with a Chanel bag.

Dressed in skinny jeans, a blue leopard-print vest top and a matching blue leather jacket, Paris was wearing a glum expression.

Paris' new BFF, Brooke has also been trying to smile through tough times recently.

Princess: Paris was filming her new reality show outside her house in Beverly Hills

Her ex, Charlie Sheen, 45, had a very public meltdown at New York's Plaza Hotel following a night with porn star Capri Anderson on October 26.

And after months of separation triggered by Sheen attacking Mueller on Christmas day last year, the actor finally got round to filing divorce papers on November 1.

The newly-single mother is just one of the co-stars in Paris' as yet unnamed show, which will screen on the cable channel Oxygen.

A statement from Oxygen reads: 'Paris has led a very public, jet-setting life. As she enters the next stage of her life, the provocative heiress and her life beyond what's seen in the tabloids will become the focus [of the show].'

Along with Brooke, others who will appear on Paris's show include her mother Kathy Hilton, photographer Jennifer Rovero and socialite Allison Melnick.