Who wears short shorts! Alli Simpson steps out in all-black ensemble for launch and slumber party at Vogue Fashion Night Out

Her latest track Roll Em' Up has her singing about short shorts.

And on Thursday, Alli Simpson stepped out bringing her music to life wearing a chic ensemble at the JT One launch at David Jones in Sydney. 

The 17-year-old, who is the younger sister of Cody Simpson, headed down to the Elizabeth Street store for the slumber party which was held as part of Vogue's Fashion Night Out.

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Stepping out! On Thursday, Alli Simpson attended the JT One launch at David Jones in Sydney

Stepping out! On Thursday, Alli Simpson attended the JT One launch at David Jones in Sydney

Alli wore her Vogue's Fashion Night Out black and gold t-shirt and teamed it with leather-look shorts and simple gold heels. 

She wore her trademark long blonde locks out over her shoulders with her fringe back off her face and wore dewy makeup including soft eye shadow and mascara. 

The US based star also wore a nude lip and touches of bronzer.  

Alli wore her Vogue's Fashion Night Out black and gold t-shirt and teamed it with leather-look shorts

Alli wore her Vogue's Fashion Night Out black and gold t-shirt and teamed it with leather-look shorts

The star was joined by the likes of Montana Cox on the night
Alli wore her long blonde locks out and straight over her shoulders with her fringe pulled back

Picture perfect: Alli, who was joined by the likes of Montana Cox, wore her trademark long blonde locks out over her shoulders with her fringe back off her face and wore dewy makeup including soft eye shadow and mascara

Hug it out! The blonde beauty who is based in the US, seemed to be thrilled to be at the event 

Hug it out! The blonde beauty who is based in the US, seemed to be thrilled to be at the event 

She was joined on the evening by the likes of David Jones ambassadors Montana Cox and Jessica Gomes.

Jessica wore also wore her Vogue's Fashion Night Out t-shirt and wore the look with a leather jacket and high-waisted black jeans. 

She had her brown locks out over her shoulders and wore neutral looking makeup including light foundation and bronzer.

Jesinta Campbell also made an appearance and wore her shirt with a skirt. 

Putting their best foot forward! Alli was joined at the event by  Jesinta Campbell and Jessica Gomes

Putting their best foot forward! Alli was joined at the event by Jesinta Campbell and Jessica Gomes

Alli took the time to pose with fans at the event, and took numerous selfies with them. 

She also posed up alongside the models at the shin dig.

She hosted a runway show for the fashion brand JT One alongside Montana and Jessica and happily grabbed the microphone to talk to the crowd.

Selfie time: The singer happily posed with fans for photographs at the event

Selfie time: The singer happily posed with fans for photographs at the event

The 17-year-old headed out to the Elizabeth Street store for the event
The 'slumber party' was part of Vogue's Fashion Night Out

Ready for a good night: The 17-year-old radio star, who is the younger sister of Cody Simpson, headed down to the Elizabeth Street store for the 'slumber party' which was held as part of Vogue's Fashion Night Out

Air kisses: The beauty appeared to be in good spirits at the bash

Air kisses: The beauty appeared to be in good spirits at the bash

Alli recently opened up to Daily Mail Australia about Canadian singer Justin Bieber and said she would be keen to date the crooner. 

'I mean yeah, who wouldn't?,' Alli said.  

'He's so sweet. I think the majority of girls in this world would.'

She added of the Baby singer: 'He really is so sweet and super attractive and just so nice.' 

Greeting the crowds: The Roll Em' Up artist hosted a runway show for the fashion brand JT One alongside Montana and Jessica

Greeting the crowds: The Roll Em' Up artist hosted a runway show for the fashion brand JT One alongside Montana and Jessica

She seemed to have no nerves at all on stage
Alli broke out into a smile as she talked

Confident: She seemed to have no nerves at all hitting the stage 

Opening up: Alli recently spoke to Daily Mail Australia about Canadian singer Justin Bieber and said she would be keen to date the crooner

Opening up: Alli recently spoke to Daily Mail Australia about Canadian singer Justin Bieber and said she would be keen to date the crooner

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