*BY FLORA LYIMO DESIGNER* 
Jessica Alba was set to bring in her new decade in style, by celebrating her 30th birthday in a neon yellow maternity dress over a pair of flared jeans.
Her 70s-inspired outfit was embellished with platform heels and a beehive hair-do as she arrived at the Chateau Marmont in Hollywood.
The pregnant actress might not have been able to enjoy any champagne to bring in a new year but she still had a great day celebrating with friends and family.
Retro style: Jessica's 70s-inspired outfit was embellished with platform heels and a beehive hair-do as she arrived at the Chateau Marmont
Retro style: Jessica's 70s-inspired outfit was embellished with platform heels and a beehive hair-do as she arrived at the Chateau Marmont
Jessica still had some work to do on her special day though and was a special guest at the Piaget press day at the Chateau.
She is the new face and brand ambassador of Piaget’s Possession jewellery line and posed next to her promotional shots at the exclusive hotel on Sunset Boulevard.

 

The Sin City actress features in six photographs for the brand, wearing a diamond-studded cuff, a ring and earrings.
The stylist for the shoot said of Jessica: ‘She’s modern and young and cool and beautiful. I think Jessica’s the perfect face of Piaget.’
Jessica says in YouTube clip for the jewellery collection: ‘The thing that’s so great about these pieces is how chic and simple they are.
Modelling contract: Jessica is the new face and brand ambassador of Piaget's Possession jewellery line
Modelling contract: Jessica is the new face and brand ambassador of Piaget's Possession jewellery line
Modelling contract: Jessica is the new face and brand ambassador of Piaget's Possession jewellery line

The big day: The pregnant star celebrated her 30th with her two-year-old daughter Honor and husband Cash Warren
The big day: The pregnant star celebrated her 30th with her two-year-old daughter Honor and husband Cash Warren
‘I love the idea of layering the gold and the silver and rose…. The thing about Piaget is that it’s jewellery that you hang on to and pass down.’
Jessica also found time on her birthday night to thank her Twitter followers for their best wishes.
She tweeted: ‘Thx for all the bday wishes from my tweeps in EU!’
Face of Piaget: Jessica posed with her poster for the jewellery range yesterday and posted her picture on Twitter
Face of Piaget: Jessica posed with her poster for the jewellery range yesterday and posted her picture on Twitter
And added: ‘Thank u all 4 bday tweets! My bday wish is also to become friends with ya’ll on FB’
The pregnant star celebrated her big day with her two-year-old daughter Honor and husband Cash Warren.
The couple are expecting their second child at the end of summer and has said recently that she’s not as anxious about pregnancy this time around.
WATCH JESSICA ALBA IN HER PIAGET SHOOT BELOW