When it comes to experimenting with a new haircut we've got the A-list to rely on for inspiration. But where do they look for ideas when they're in the market for a new 'do? From Dita's 40s glamour to Pixie's 90s grunge, the A-list take their inspiration from the iconic styles of decades past.
The A-list guide to retro glam hair
With rich, glossy chestnut hair Katie can carry off pretty much any style she chooses – but her pinnacle moment in our opinion was when she went for the chop with a 20s-style chin-length bob with blunt fringe.
The A-list guide to retro glam hair
Heidi stunned the star-studded crowd at Milan Fashion Week when she teamed her shimmering floor-length gown with 30s-inspired finger waves reminiscent of the starlets of Hollywood's golden age.
The A-list guide to retro glam hair
Epitomising 40s sophistication with her ever-immaculate sleek bouncing waves, Dita is never seen with a hair out of place. And the star's signature look is not complete without the porcelain skin, red lipstick and dramatic flick of liner, evocative of the era.
The A-list guide to retro glam hair
A true style chameleon Katy has been through myriad hairstyles since she burst onto the music scene but she invariably returns to the classic glamour of the 50s - the perfect era to flaunt her shiny black curls.
The A-list guide to retro glam hair
When Carey went for the chop she confessed that she hated it and couldn't wait to grow it out. But as the pioneer of the pixie-crop revival, it would seem everyone else loves it... including us. It's not a look for the faint-hearted but it's the perfect complement to Carey's petite features.
The A-list guide to retro glam hair
While many of her Hollywood counterparts change their hairstyles more often than they change their boyfriends, bohemian babe Mischa has shown no signs of lopping off her centre parted hippy-chick lengths. She does occasionally add a hippy headband to shake things up though.
The A-list guide to retro glam hair
Rihanna's experimental styles are evocative of the punk era. In contrast to the loose-flowing low-maintenance locks of the hippy era, the 80s was all about experimental cutting edge styles. Bold, blunt cuts shaved underneath with contrasting blocks of bright electric shades to highlight the textures.
The A-list guide to retro glam hair
Pixie has embraced this season's grunge revival with a passion, sporting centre-parted mussed-up waves and of course, the obligatory dark grown-out roots with bleached ends. Kurt Cobain is dead. Long live Kurt Cobain.