Adele's bouffant beehive is the perfect companion to her retro sound.

Alexa Chung can work the shaggy mid-length cut like no-one else.

Alice Eve's Bardot-inspired up-do is super-chic and chimes perfectly with this season's sixties trend.

Amanda Seyfried's wavy, slightly undone up-do looks dishevelled but elegant, and requires little effort.

Amber Heard is a modern-day Monroe with her golden set curls.

The 'statement parting' was a key trend on the autumn/winter runways. Ashley Green works hers with super-sleek hair.

Beyonce's performance at Glastonbury was unforgettable - as was her fierce afro hairstyle. We wish Bey wore it like this more often.

Blake Lively is often pictured with covetable hair on the red carpet, but when she went red we really sat up and took notice. Although she went back to blond again, this red hue really made her blue eyes pop.

Cary Mulligan may have started to grow out her cute pixie crop (probably for her role in The Great Gatsby), but it was one of our favourite short hairstyles of the year.

Cheryl Cole returned to the spotlight after a brief hiatus with a killer Victoria Beckham dress and this golden mid-length bob - the slightly curled ends made it even more glamorous.

It was hard to pick our favourite Diane Kruger hairstyle, but this half-up, half-down 'do was slightly forties and matched her Miu Miu dressed perfectly.

Dianna Agron transformed her look from Glee's golden girl to a slightly edgier, cooler starlet with this choppy short style.

Ombre or dip-dye hair was a major trend for 2011- Drew Barrymore was sporting it way back in January.

Elizabeth Olsen is not only one to watch for her immaculate dress sense - here she sports a cool top-knot.

Flying the flag for redheads everywhere (even though blonde is her natural colour), we were glad when Emma Stone went back to red. These marcel waves are so elegant - and will work next season when the 1920s are a major trend.

Emma Watson's crop divided opinion, but we think it suited her delicate features.

Evan Rachel Wood was another celebrity that went for the chop in 2011, but her look was a lot more rock n' roll, with lots of slicked-back hair and androgynous quiffs.

This cool, retro bob really suits Fearne's heart-shaped face. Wear straight by day, and wavy by night.

Plaits were seen all over the red carpet this year - but Freida Pinto's more elegant take on Heidi braids was our favourite.

2011 was the year of weird and wonderful hair colours (see also: Nicki Minaj) - Lady Gaga almost had us considering a green rinse.

Another star that went short in 2011, Ginnifer Goodwin shed her cute image with this edgy crop.

A catwalk hair trend that seemed far too tricky to recreate, Gwen Stefani pulled off slicked back hair with aplomb on the red carpet.

Who knew the humble schoolgirl plait would make a reappearance? Rising star Hailee Steinfeld, plus Jessica Szhor and Poppy Delevigne, were all seen sporting braids this year. We liked Hailee's jewelled bow - very Lanvin.

Jaime King sports the 'faux bob', an elegant up-do that from the front, gives the impression of a shorter cut.

Retro hairstyles were big news on the red carpet during awards season. We loved January Jones' fun rockabilly quiff.

This sweet, Jane Austen-esque 'do looked chic with Jessica's empire-line dress. We love the jewelled hairpiece too.

Jessie J is a bit of a hair chameleon - she's gone purple and dip-dyed her hair red this year - but we like her signature black bob the best.

We were so envious of supermodel Karlie Kloss' mid-length style at the Met Gala. Straight, glossy and with a deep side-parting, she reminded us of a young Veronica Lake, or the Charlie Girl ads of the 1970s.

The Bleach salon in Dalston might have started it, but the dip-dying trend went global when stars like Kate Bosworth and Lauren Conrad experimented with candy-coloured tips.

Katy Perry wore many creative hairstyles on the red carpet this year, but this pink up-do accessorized with crystals was by far our favourite.

Keira Knightley wowed at the Venice Film Festival with her asymmetric bob.

The best example of retro waves on the red carpet came courtesy of actress Kerry Washington.

Ponytails were the biggest hair trend on the autumn/winter catwalks - Lea Michele made hers glamorous enough for the red carpet.

Leigh Lezark has always been on our hair lust list (yes, we have one). Her trademark choppy bob was transformed with this cool schoolgirl fringe.

Lily Collins reminds us of Audrey Hepburn with her short fringe, hair-band and beehive hairstyle.

No-one pulls off short hair like the My Week With Marilyn star. We took this picture of Michelle Williams to the salon when we went for the chop.

Miranda Kerr pulls off another tricky hair trend - extreme slicked back hair, and a severe parting - and looks incredible.

Nicola Roberts shows that redheads can also work the ombre hair trend.

Olivia Wilde wears the coolest ponytail we've seen all year.

Olivia Palermo's hair always looks immaculate - but we like how she's mixed curly and straight to shake up her simple mid-length 'do.

Rachel McAdams goes for full-on glamour with this voluminous style.

Kudos to Alice Dellal, who managed to make a severe, punky undercut look chic.

Rihanna's vibrant red hair has become her trademark - and looks cool worn in retro Victory Rolls.

Girl with the Dragon Tattoo star Rooney Mara's bold fringe is the edgiest style on the red carpet right now.

Rose Byrne shows how to work a fringe well - with a mid-length cut for a modern look.

Side-swept hair was another big red carpet trend - but Rosie Huntington-Whiteley's locks had the most bounce.

We love the drama of Scarlett Johansson's curly up-do, and diamante hair accessory.

Solange's cute mini-afro was one of our favourite looks of New York Fashion Week.

Vanessa Hudgens went from teen star to grown-up starlet with this choppy bob.

Zoe Kravitz shows off the perfect rock chick hairstyle - choppy, with a messy fringe and loose waves.