Sasha Obama just wants to go back, back to 1999! The former First Daughter attended Charli XCX and Troye Sivan's Sweat tour in a throwback-inspired outfit that would have been right at home in the late '90s and early 2000s, complete with one of the most popular accessories of that time: the chunky belt.

Sasha wore a vintage Jean Paul Gaultier graphic long-sleeve tee and a pair of True Religion jeans, styled with an oversized belt sitting on her hips. The youngest Obama tucked her denim into a pair of black kitten-heel boots with a pointy toe and carried a red croc-embossed purse over her shoulder.

Brat summer has officially been extended into fall, thanks to Charli XCX and Troye Sivan’s star-studded Sweat Tour – and Sasha and Malia Obama are leaning in. The sisters, who

September, Charli XCX and Troye Sivan's Sweat Tour has enjoyed a star-studded audience, with everyone from Chloë Sevigny to Blackpink's Jennie supporting the musical duo from the stands. During their most recent stop at Los Angeles's Kia Forum,