The Do It Like A Dude songstress flaunted her slender, envy inducing figure in the see-through striped one-piece that boasted sheer, floor sweeping flares, 80s-inspired shoulder-pads and a very daring plunging neckline.
As Jessie assumed her her spot in front of the cameras, the endless flashes meant that her jumpsuit became completely see through, giving us an eyeful of her skin-tight leotard and pins for days!
Unfazed by showing off that much leg, gorgeous, confident Jessie posed hand on hip and pulled a series of sultry pouts for the paps that had come to catch a glimpse of her, One Direction and Miley Cyrus to name but a few stars in attendance.
Jessie shunned the fancy accessories in favour of a jewel-toned lip that matched the vertical stripes in her jumpsuit and she showed off her new silvery crop.
We also have to hand major kudos to the stunner for ditching the glam-squad (take note Kardashian-Jenner clan) as she took to Instagram during the evening to tell her 4.5million followers that she had painstakingly applied every single product herself.
Just another reason to fall in love with her, then!
Jess stood tall in a pair of burgundy pointed court heels and sashayed down the red carpet into the glitzy venue to show her support for World Aids Day alongside a whole hoard of celebrity pals.
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