Despite being just 17 years old, the singer proved she's got things sussed in the wardrobe department by rocking a quirky LBD with a twist.
We can't get enough of Dionne's form-fitting frock, which featured a high neckline, long sleeves and tons of silver studs.
She tucked her long tumbling locks behind her ears to reveal her super-size hoop earrings, but kept the rest of her jewellery minimal.
And while we liked her cute dress, we fell head-over-heels in love with her peep-toe sandals!
Dionne looked disco-ready in her eye-catching heels with their towering platforms and fierce holographic design.
The best part? They're a bargain buy straight from the high street - hooray! Snap them up here for £55 from River Island.
If platforms aren't your thing, check out these metallic strappy sandals, £48 from Topshop.
The songstress finished her look with bold brows, liquid liner and lashings of mascara while showcasing some impressive nail art on her talons.
Good work, Dionne!
Got an iPad or iPhone? Reveal Mag has been especially designed to fit!
What do you think of Dionne's outfit? Let us know by commenting below as the best comment across the site each week wins £50!