Jessica Alba shows off her new look to photographers outside the salon.

It's amazing what a good night's sleep and a chic new haircut has done for Hollywood star Jessica Alba. The Sin City actress sported a stunning new 'fringe' trim in Los Angeles a couple of days ago this week, Mail Online reported.

The 27-year-old was spotted by photographers as she left the hairdresser in Beverley Hills.

Surrounded by an army of paparazzi she looked relaxed with her new bob - wearing big sunglasses, a yellow scarf, a grey top, jeans and slip-on gold shoes.

Jessica Alba went from dowdy to fresh

Jessica Alba went from dowdy to fresh

The contrast with her appearance two days ago could not have been more stark when she was pictured buying a smoothie, shopping at baby store Bel Bambino looking worn out with her hair in a side-parting.

The new do certainly appeared to impress her husband Cash Warren who was pictured running with an approving smile on his face.