One Direction were the first act to arrive on the red carpet, showcasing a LOT of man cleavage - LOOK at the open shirts on Liam Payne, Niall Horan and Harry Styles?! We need a lie down! What a way to start the arrivals in style!
Next up were 1D's BFFs Little Mix... and the ladies were going BIG for the Ball this year, big hair that is! Jesy, Perrie, Jade & Leigh-Anne proved they were daring in the fashion stakes with these stunning outfits - how cool are Perrie's little white number and Jesy's '70s style jumpsuit?
Rita's always pushing the boundaries when it comes to fashion - there aren't many people who could pull off a maxi dress this sheer and flowery but Ms Ora looks totally incredible. We bow down to your fashion powers, Rita!
Jake Roche is never one to be afraid of making a statement with his outfits, and not many people could carry off a leopard print jacket with quite such style! The rest of the band kept it nice and neutral - top marks from us!
5H upped the sass factor with their feisty poses on the red carpet - they sure know how to work dem angles!
Whit woo! Megan's super cute gold skater skirt is a definite style win - we like the way she paired it with her floral top - casual but VERY cool.
Swagtastic! If you need someone to carry your phone or keys, Jason is the person to know - he came in a pair of trousers bedecked with zips galore. We love his chic style - gorgeous, Derulo!
Kelly kept it cool and classic in a cream dress with gold accents. The flash of flesh with the sheer panels in the lace dress and the contrasting gold shoes dressed up the neutral palette perfectly.
We grilled Kelly on which stars she stalks on Twitter and her answer was.. surprisingly honest! A girl after our own heart, Kells!