Christina Aguilera turned heads with her remarkable transformation as she graced the red carpet at the Breakthrough Prize Ceremony on Saturday.

The 45-year-old pop icon captivated onlookers at Santa Monica’s Barker Hangar, donning a striking black leather gown that emphasized her cleavage and showcased her impressive figure.

Aguilera’s outfit accentuated her slender waist, a testament to her notable 50-pound weight loss over the past few years.

While her dramatic transformation has sparked speculation about the possible use of weight-loss drugs like Ozempic, Aguilera has not publicly confirmed any use of medication in her weight loss journey.

Accompanying her at the event, fondly referred to as the ‘Oscars of Science,’ was her fiancé, Matthew Rutler, who looked dapper in a coordinating black suit.

The couple attended in support of the Breakthrough Prize’s mission to “honor scientists whose discoveries are significantly advancing human knowledge,” as detailed on the event’s official website.

Christina Aguilera put her astounding weight loss on full display with a sizzling appearance on the red carpet for Thursday’s Breakthrough Prize Ceremony

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

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

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.

Aguilera complemented her dress and elevated her stature with a pair of pointy black open-toe heels.

She contrasted her ensemble with her peroxide-blond hair, which was styled in a chic bob with upturned ends and blunt-cut bangs.

The hairdo put the spotlight on her necklace, which featured a large dark stone on a strand of tightly packed diamonds.

Aguilera also wore a sleek bracelet and multiple rings to complement the glowing piece.

She and her fiancé, Matthew Rutler, were on the same page when it came to their black outfits, but he appeared to have committed a faux pas by wearing what looked like a black suit — with the bottom button fastened — rather than a tuxedo like many of the other attendees.

Aguilera’s 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 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. She wore a blond blunt-cut bob that highlighted the large jeweled necklace around her throat

She and her fiancé, Matthew Rutler, were on the same page when it came to their black outfits, but he appeared to have committed a faux pas by wearing what looked like a black suit — with the bottom button fastened — rather than a tuxedo like many of the other attendees

The couple have been together going all the way back to 2010, and they have been engaged for more than a decade after Rutler popped the question on Valentine’s Day of 2014. They share nine-year-old daughter Summer, while Aguilera also has 16-year-old son Max with her ex-husband, Jordan Bratman

He paired the ill-fitting suit with a set of chunky, overly casual black shoes, and he opted for a black necktie, rather than a bow tie.

Rutler, who had a well-groomed beard, kept his arm wrapped around his fiancée and sweetly planted a kiss on her cheek as they posed. 

The couple have been together going all the way back to 2010, and they have been engaged for more than a decade after Rutler popped the question on Valentine’s Day of 2014. 

The lovebirds share one child, 11-year-old daughter Summer, and Aguilera also shares 18-year-old son Max with her ex-husband, Jordan Bratman. 

She and the music executive tied the knot in 2005, before separating in 2010 and finalizing their divorce a year later.