Someone's forgotten their skirt! Jessica Alba arrives at Paris fashion show in just a sexy electric blue shirt, tights and heels

PUBLISHED: 02:01, 6 March 2013 | UPDATED: 03:04, 6 March 2013

With her ultra short electric blue shirt, black tights and heels, Jessica Alba's outfit was simple yet startlingly effective as she stepped out at a Paris fashion show on Tuesday.

The 31-year-old star risked a lack of skirt or trousers in the extremely short and sexy outfit for the Autumn Winter 2013 Shiatzy Chen show.

A fashionable high bun, simple jewellery, cats eye black make-up and an oversized black bag completed the look.

She's electric: Jessica Alba showed off her slim legs in a blue shirt, black tights and heels as she attended the Shiatzy Chen show on Tuesday

The star looked in good spirits as she sat in the front row of the show and seemed extremely interested in the action on the catwalk.

She even took a few photographs of certain outfits using her phone.

Jessica has been enjoying indulging her passion for fashion during her trip to the French capital.

Fashionista: The actress has been taking in the stylish sights of Paris Fashion Week, earlier attending a Valentino show

Snap happy: Jessica took photographs of the action with her iphone

Snap happy: Jessica took photographs of the action with her phone

Passion for fashion: The actress (far left) paid close attention to the models strutting down the catwalk

Earlier, she sported a completely different ensemble for the Valentino show, which was also attended by Nicole Richie.

She has also been spotted taking in the designs of Stella McCartney, Kenzo and Diesel.

The actress has also been enjoying taking in the sights of the French capital, tweeting a picture of herself, make-up artist Lauren Andersen and and eldest daughter Honor sitting in the back of a taxi.

Checking out her handiwork: The star examined her pictures after the catwalk spectacular

'Bonjour #Paris #girls-trip! W @lauren_andersen & my big girl!' she wrote alongside it.

But it wasn't the end of a busy day for the actress who changed her outfit yet again to a more sophisticated evening number for a party.

The actress let her brown hair down in loose waves around her shoulders and swapped her outfit for a clinging one shouldered dress adorned with black bows.

Simply stunning: Jessica plumped for a more sophisticated one shouldered look in a ruffled black dress in the evening to attend the CR Fashion Book Issue 2 - Carine Roitfeld Cocktail event