The 'Facemelt' singer gave a talk at the event - which was held at Palais des Festivals - about her partnership with the VEVO artist development programme, Lift.
Blonde bombshell Rita paired a plain black crop top with a navy floor-sweeping maxi skirt, which featured a lighter blue panel running down the front.
To add a tough edge to her look, the starlet threw on a quilted leather jacket and retro round sunnies, plus several gold rings.
She layered up her necklaces and showcased a brightly coloured manicure - the same one she rocked at the Grammys last weekend (and still not a chip in sight!)
Beauty-wise the songstress sported her trademark look of red lips, winged liner and bold brows, styling her locks in loose shoulder-grazing curls.
In other news, Rita recently announced on BBC Radio 1 that she has partnered up with DJ boyfriend Calvin Harris on her new single, 'I Will Never Let You Down'.
That will put those split rumours to rest, then!
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Watch Rita performing 'Facemelt' below: