Christina Aguilera Stuns in Plunging Leather Gown

Christina Aguilera put her astounding on full display with a sizzling appearance on the red carpet for Thursday's .

The 45-year-old singer–songwriter had all eyes on her at Santa Monica's Barker Hangar thanks to a stunning black leather gown that put her cleavage on prominent display.

The look highlighted her tiny waist after she celebrated losing an impressive 50 pounds in recent years.

Her slimmed-down figure has left fans wondering if Aguilera might have used Ozempic-like weight-loss drugs, but she has never confirmed using medications to shed the weight.

Aguilera was joined at the event, which is nicknamed the ' of science' — by her fiancé, Matthew Rutler, who complemented her with a black suit.

They were supporting the Breakthrough Prize's quest to 'honor scientists whose discoveries are significantly driving growth of human knowledge,' according to the ceremony's website.

Aguilera spiced up the red carpet with her low-cut dress, which had thin straps that hung down around her arms and a flat top that barely covered her prominent bust. 

The Genie In A Bottle singer's look featured a black leather bodice that was lightly wrinkled around her midriff, but it transitioned to a slim black lace skirt at her hips. 

The ruched skirt hinted at her toned legs and featured a modest train that trailed behind her.