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For the performance, Charli wore a Vaquera trompe l’oeil bra print baby tee that toyed with illusion and irreverence. Cut from white cotton jersey, the fitted silhouette kept things pared back while the graphic did all the talking.

Vaquera Bra Print Baby Tee ($125.00)

Underneath, our girl wore a pair of MISBHV silver-coated dirt low-rise denim jeans, which feature a structured waistband with belt loops, logo plaque at front, leather logo patch at back and branded silver-tone hardware.

MISBHV Silver-Coated Denim Jeans ($480.00)

Charli accessorized with her Balenciaga "Side Xpander" cat eye sunglasses in black, from the brand's Pre-Fall 2023 collection.

Balenciaga "Side Xpander" Black Sunglasses ($585.00)

For the occasion, Kesha donned The Frankie Shop "Chicago" oversized biker jacket in black faux leather.

She also wore a purple T-shirt from Vivienne Westwood's Fall/Winter 1999 collection, which commemorates her innovative "SEX" shop and features its years of operations —1974-1977— in bold yellow lettering.

Kesha also donned these MISBHV washed black shorts with elasticized waistband and logo at front.

© Roy Rochlin / Getty Images

Furthermore, she rocked the Azalea Wang "Aguilar" thigh high suspender boots in black leather.