It's hard to be upstaged when you're Cara Delevingne - unless of course you spend New Year's Eve knocking around with a preened and polished Rihanna, whose glamour it seems, will not be beaten. 

Speaking of glamour, Marc Jacobs took plenty of it to St Barths, where he wore a colourful Prada fur coat to walk Instagram's favourite dog Neville - casual, like - before showing off his golden tan while partying with Derek Blasberg.

Up in perma-party city Las Vegas Britney Spears kicked off her two year residency at Planet Hollywood with none other than Katy Perry and Miley Cyrus dancing along with the living legend in the audience. Just days later in NYC Miley took to the stage herself for the city's massive New Year's Eve celebration in Times Square wearing some incredible gold trousers and indicating that we're not likely to see any less of her in 2014.