The “What Was I Made For?” singer accessorized with a pair of delicate oval sunglasses and platform heels.

Billie Eilish elevated a traditional button-down shirt on Sunday during her red carpet appearance at the Critics Choice Awards 2024 in Santa Monica, Calif., with a look from Thom Browne.

Billie Eilish attends the 29th Annual Critics Choice Awards at Barker Hangar in Santa Monica, California on Jan. 14, 2024. GETTY IMAGES

The singer, best known for her most recent release of the song “What Was I Made For?” in Greta Gerwig’s “Barbie,” wore a long fitted black dress with gray contrast stitching on the bodice and side seams. Underneath her gown, Eilish wore a white floor-length shirtdress that extended underneath the hemline.

Eilish accessorized with a pair of matching black lace-up platform shoes. The star also wore a pair of silver cross earrings, as well as a pair of Oliver Peoples silver oval sunglasses with slightly tinted black lenses.

Billie Eilish attends the 29th Annual Critics Choice Awards at Barker Hangar in Santa Monica, California on Jan. 14, 2024. GETTY IMAGES FOR CRITICS CHOICE

Keeping her makeup in line with the rest of her look, Eilish paired her thick black winged eyeliner with a nude lip and lightly blushed cheeks. Adding a pop of color to her look was Eilish’s hair, dyed at the roots in a fiery red hue and pulled back into a low ponytail.

Eilish was recently seen at the Golden Globe Awards 2024 with her signature colorful hair in an oversized button-down shirt and blazer by Willy Chavarria. The look, styled to appear much more oversized than her outfit from Browne, was paired with a long khaki skirt and strappy Mary Jane shoes.

Dua Lipa and Billie Eilish.

JOHN SHEARER/GETTY

The Critics Choice Awards recognize the greatest film and television achievements of the year. Hosted by comedian Chelsea Handler, the 29th annual ceremony airs live on The CW on Sunday, Jan. 14. Margot Robbie will honor her “Barbie” co-star, America Ferrera, with the SeeHer Award, while James Mangold will present Harrison Ford with the Career Achievement Award.