The Starry Eyed singer hit the Samsung Galaxy Note 3 launch party in London working a high-glam frock and super-polished make-up.
Ellie's after-hours look was a far cry from her edgy stagewear, paired with skin that was just the right side of bronzed and tousled hair. She kept her make-up nude yet glossy to let her shimmering LWD do the talking.
Loving her style? The songstress' dress is straight from the high street at just £40 from Topshop. It's almost cleared the shelves with just a couple of sizes left so get in there sharpish!
It's not just Ellie that's been rocking the look. We spotted The Only Way is Essex star Ferne McCann wearing a similar number back in May for a white party in Marbella with Sam Faiers and Billie Faiers.
With strappy white heels and a wavy 'do, it wasn't a whole lot different from Ellie's latest get-up.
Ferne's dress, £120 reduced to £48, has been a sell-out too with just a few still available at Asos.
You're looking more than 'all-white', girls!
What do you think of Ellie and Ferne's outfits? Tell us below as the best comment from across the site each week wins £50!