By Alisha Buaya For Daily Mail Australia
Published: 14:06 GMT, 8 November 2019 | Updated: 14:53 GMT, 8 November 2019
She's the younger sister of Cody Simpson who knows how to rock a red carpet.
And Alli Simpson certainly wowed in a chic black ensemble for Boohoo Holiday 2019 Launch Event in Los Angeles on Thursday.
The singer-songwriter, 21, stepped out in a sheer polka-dot top that showed off her bra.
Sheer delight! Alli Simpson flashed bra as she stepped out for the Boohoo Holiday Launch in Los Angeles
She teamed the look with black trousers with pumps and accessorised with a chain purse and statement earrings.
For a pop of colour Alli rocked a bold red lip, along with lashings of mascara.
This comes after she spoke about her older brother, Cody Simpson's new romance with Miley Cyrus.
Chic: The singer-songwriter, 21, stepped out in a sheer polka dot top that showed off her bra, black trousers with pumps, and accessorised with a chain