The mid length bob is now the modern bob.
Jessica Alba was one of the first celebrities to be spotted with the chic haircut, and soon stars such as Heidi Klum, Elizabeth Olsen and Scarlet Johansson followed suit.
Depending on the shape of your face, you can choose a shorter or longer cut.
If your face is wide, the length of your hair should reach your shoulders but if your face is oval you can get off with cutting it shorter.
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HELLO! Online has spoken exclusively to Top Session Stylist Stephen Low at celebrity hair haunt, Neville Salon.
Stephen looks after Jessica Alba whenever she visits the UK and has revealed all the secrets behind the sophisticated 'do.
"Ask your stylist to add some soft layers, this will add body and move the classic bob into this seasons' sassy must-have hairstyle.
"It's all about playing with texture, you can wear the look sleek or you can vamp it up by adding lots of texture and volume.
"Adding a soft fringe will really make your eyes pop and give the bobo a cooler edge. This style can work for everyone as long as you have the confidence to carry it."
How to achieve the wavy tresses
To achieve this look it's best to blowdry your hair with a smooth finish.
"Jessica's mid length bob is quite a blunt cut so it's best to really blowdry the hair from root to tip to enhance the simple yet striking style," suggests Stephen.
The luxury Babyliss PRO Volare V1 Hairdryer – which features a powerful engine designed by the Ferrari Challenge Team, is perfect and will have your hair dry in no time.
The use of a round brush is also recommended as it gives better results.
"The art is to produce an inward kick towards the tips of the hair so the hair falls and frames the face."
If working with brushes is not your strength then don't worry, the YOGI Fat Barrel Wand is easy to use and will help you achieve the same look.
Section off the top half of the hair and use the YOGI Fat Barrel Wand on the underneath sections.
Take medium sections and wind the hair backwards, when the hair has cooled simply run your fingers through and you will be left with gorgeous flared hair.
The YOGI Wand also gives big hair so if yours is shorter it will give you a bouncy blowdry look as worn by Cheryl Cole.
To achieve this look put some volumising tonic or mousse on wet hair and blowdry your hair upside down.
Take medium size sections of the hair and wrap around the wand holding it as close as possible to the roots.
Run your fingers through – you can even lightly backcomb the roots with a wide tooth comb, mist lightly with hairspray and you'll be ready for the red carpet.
More information on the Babyliss PRO Volare V1 Hairdryer is available at Babyliss.
Details on the YOGI Fat Barrel Wand are available at YOGI.