The 25-year-old singer made sure all eyes were on her, showing off her incredible figure in her hot pink cigarette pants.
Jessie teamed her pink pants with a sheer black shirt and cool zebra print bag.
Accessorising with gold strappy sandals, cool cat-eye sunnies, and gold hoop earrings, Jessie lived up to her pop babe status.
The hit maker sported her short platinum blonde hair in a quiff style and showed just a hint of pink blush and glossy pink lippy.
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Listen to Jessie's single 'It's My Party' below: