Billie Eilish co-headlines Lollapalooza Brazil in Sao Paulo with Lil Nas X trends now

Billie Eilish performed during the first day of the Lollapalooza Brazil festival at the Autodromo de Interlagos in Sao Paulo on Friday night.

The 21-year-old performer appeared to be making the most of her time on stage as she belted out several of her hits for her adoring fans.

The hitmaker - who recently shared several throwback snaps featuring her Swarm co-star Dominique Fishback - was joined by several other artists, including Kali Uchis and Lil Nas X, at the music festival.

Eilish wore a green-and-white football jersey top while performing for her fans.

The Bad Guy singer also wore a striped long-sleeve shirt underneath her outerwear during the performance.

The Grammy-winning performer paired her top with a pair of black-and-white Air Jordan athletic shorts and matching socks.

She added a bit of extra color to her look with a pair of partially bright yellow Nike high-top sneakers.

Eilish accessorized with several sparkling necklaces and rings as she spent time on stage.

The Los Angeles native tied much of her jet-black dyed hair into a pair of braids that fell onto her shoulders.

The hitmaker finished her outfit with an orange-and-white trucker cap that she turned back and forth during the show.

Uchis opted for a form-revealing outfit that included a white top that showcased her toned arms and stomach during the festival.

The 28-year-old singer paired her top with a miniskirt that showed off her thighs a she played for her fans.

The Telepatia singer donned a pair of fuzzy knee-high boots that paired well with her form-revealing tops. 

She added an element of shine to her outfit with a pair of sparkling silver hoop earrings.

Uchis' beautiful dark brunette hair was styled up for the length of her show and contrasted perfectly with the lighter tone of her clothing. 

Lil Nas X wore a sparkling corset-esque top that featured a pair of suspenders during his performance.

The 23-year-old also wore a pair of loose-fitting white-and-gold pants that added a bit of extra glam to his look.

The Old Town Road singer accessorized with a bracelet and a choker, both of which matched the dominant tone of his top.

At one point, the Grammy-winning performer donned an eye-catching dress constructed of pearl-esque beads.

The performer donned a black wig that added a bit of darkness to his look.

Lil Nas X was also joined on stage by drag queen Pabllo Vittar during his time on stage.