She’s an international pop star known for her sensational vocals, quirky style sense and killer body.

And, Katy Perry flashed her ample cleavage in a powder blue bra and sheer top as she mimicked lingerie mannequins at the launch of The Kit Undergarments on Monday night.

The Firework hitmaker lent her support to the event by showing up wearing one of their creations beneath a sheer blue polo-neck adorned with a pretty flower sketch, and documenting her fun on Instagram.

Katy teamed her revealing long-sleeved top with wet-look tomato coloured trousers and a thick orange waist belt.

Her platinum bob was styled sleek and straight and the singing sensation sported a glamorous make-up look, complete with false eyelashes and a fuchsia lip.

On her Instagram stories, Katy captioned the start of her time at the launch event with: ‘About last night. My friends @sweetbabyjamie @simoneharouche launched @thekitundergarments I support it just like their bras support me.’

In one fun clip, the camera showed many mannequins displaying underwear from the brand, before stopping on Katy who is pretending to be one.

Wow! The Firework hitmaker lent her support to the event by showing up wearing one of their creations beneath a sheer blue polo-neck adorned with a pretty flower sketch

Fun times: In one fun clip on her Instagram, the camera showed many mannequins displaying underwear from the brand, before stopping on Katy who is pretending to be one

As she showed off her best model moves, Katy added a sticker to the video which read: “New message. Boobs.”

Meanwhile, Katy Perry became engaged to actor Orlando Bloom, 42, after her proposed on Valentine’s Day.

And, sources told US Weekly at the end of last week that the Firework hitmaker and 42 year old Pirates of the Caribbean star are planning a December wedding.