Olivia Rodrigo turns up the heat in a white mini dress as she greets fans in Sydney ahead of her sold-out show

Olivia Rodrigo turned up the heat in Sydney on Wednesday when she stepped out in a white mini dress.

The US pop sensation, 21, looked absolutely radiant in the tight-fitting frock as she greeted fans ahead of her sold-out show.

The hitmaker completed her outfit with fiery red flats and brought out her natural beauty with a light layer of makeup paired with a bold red lipstick.

Olivia's luscious locks were styled perfectly in soft waves around her shoulders, with loose tresses framing her striking facial features.

The California-born star looked to be in great spirits as she strolled through a bustling Sydney street surrounded by her entourage.

Olivia appeared on KIIS FM's The Kyle and Jackie O Show on Thursday and told Jackie 'O' Henderson about her surprising fear while performing on stage in front of thousands of fans.

'I am so scared I'm going to need to pee on stage before I go on. Every time I make sure I go because I'm like, if I get up there and do that little dance, I'm going to be freaked out and have to run off,' she said.

'I'm eating and drinking up to the very last second, which maybe isn't a best practice.'

The energetic performer has been wholeheartedly embracing all things Australian while on her Guts tour, and her fans are loving every moment of it .

Olivia has professed her love of Aussie snacks and local tourist spots and recently indulged in an iconic treat.

After sampling some Tim Tams last week, Olivia continued her culinary adventure Down Under, sharing a snap on social media of a stash of Caramello Koala chocolates.

She even brought her love of Aussie culture on stage in Melbourne, where she wore a crop top emblazoned with the words, 'Vegemite be in love,' in a playful nod to the nation's most divisive spread.

However, all was not smooth-sailing at her Melbourne shows, as she fell through a hole in the stage in a shocking gaffe at the Rod Laver Arena on Monday night.

Olivia is playing four Sydney shows at the Qudos Bank Arena on October 17, 18, 21, and 22.

They are the final stops on the Australian leg of her sold-out Guts tour.