Cindy Crawford's daughter, Kaia Gerber, stuns in lace mini with brother Presley at Marc Jacobs launch

Some beauty just can't be bought.

Cindy Crawford's teenage daughter and son, 15-year-old Kaia Gerber and 17-year-old Presley Gerber, stole the show Tuesday at the launch of Kaia's first fragrance campaign. The high school junior is the new face of Daisy Marc Jacobs -- and her leggy look rivaled her mom's sexiest shots from her own teen modeling days!

The 5'7" beauty rocked a sheer ice-gray lace mini dress with an unexpected vacuum design on the front. (Yes, you read that right -- it's a vacuum.) And with minimal makeup and simple shoulder-length waves, Kaia still looked age-appropriate. Total perfection.

Older brother Presley, an established model himself, was also in attendance to show his support. The equally-attractive blonde, who has a slew of high-profile campaigns under his own belt, donned an all-black ensemble for the affair.

Mom Cindy and dad Rande Gerber were absent, but they weren't just killing time at home: The duo was busy surprising George Clooney in London for his birthday. Rande's birthday is just a week apart from George's, and they followed up the swanky Saturday night event with a day out on the water.

While discussing her beauty routine with Coveteur, Kaia said that while she used to feel "pressured to wear make-up," she now leans more toward a fresh, natural look: "I keep it super simple," she said. "If anything, I just make sure to wash my face and wear sunscreen."

Check out photos of Kaia and Presley at the Marc Jacobs event and other appearances in the slideshow above!