She's currently Down Under with her Prismatic World Tour.

And pop princess Katy Perry has been making the most of her rare free time after two back-to-back nights performing at Sydney's Allphones Arena, joining her concert crew on board a luxury yacht in the Australian city's harbour on Sunday.

The singer was sunning herself in a pale pink string bikini, which made the most of her incredible figure and washboard abs.

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Bikini babe: Katy Perry enjoyed a relaxing day on board a luxury boat with her Prismatic World Tour dancers in Sydney, Australia on Sunday

The 30-year-old superstar wore her black locks tied back in a low bun and accessorised with a pair of silver hoop earrings.

Katy treated herself to an ice cream as she looked out to sea while chatting and joking around with her gang of backing dancers.

The star was also spotted enjoying a cocktail as she lounged around on board the boat.

Laid-back style: The natural beauty opted for a barely-there make-up look as she soaked up the sun

Ice cream treat: The Roar hit-maker tucked into a mid-afternoon snack as she gazed out to sea

She's just One Of The Boys: The brunette splashed around in the sea with her dancers

Her fun-filled outing didn't end there since Katy later achieved one of her lifelong dreams of climbing Sydney's iconic Harbour Bridge.

Suiting up in full climbing gear, the Roar singer and her team got ready to ascend the landmark at twilight.

She wrote on Twitter: 'I DID IT. Finally, after all these years talkin' 'bout it I climbed your bridge tonight Sydney!'

Day off: The singer has been in Australia for two weeks and has several more concerts to go

Testing the waters: The brunette bombshell seemed reluctant to get anything but her legs wet

Living the high life: Katy has fallen in love with the laid-back Australian lifestyle since arriving in the country

In great shape: The popular singer has been working up a sweat most nights on stage

Great friends: After spending months on the road together, Katy has become firm friends with her crew

Katy is set to remain in Australia right up until Christmas, telling the 60,000-strong crowd of loyal 'Katy cats' at a recent concert that she's become an 'honorary Aussie'.

Her first show in Australia was in Perth on the 7th of November and her last will be in Brisbane on the 15th of December.

She has well and truly embraced Aussie culture, taking a particular liking to famous Australian comedy show, Kath & Kim.

Perfect pout: The 30-year-old star struck a series of sexy poses on the yacht's railings

Snap happy: One of Katy's female friends took a series of photos of her funny poses