Hollywood's brightest stars turned out for a night of glamor, golden gongs and risqué red carpet moments at the 95th Academy Awards held in Hollywood's Dolby Theatre on Sunday night. 

Lady Gaga stunned on the Oscars champagne-colored red carpet as she arrived in a risque sheer black Versace gown with a bralette top and low-slung skirt - revealing her bare derriere.

Rihanna also topped the best dressed list, showcasing her pregnant belly in a see-through brown Alaïa leather number with cut-out detailing along her hips. 

Salma Hayek poured her curves into an orange form-fitting Gucci gown with a key hole detail, highlighting her ample cleavage.

Ana de Armas channeled Marilyn Monroe in a Louis Vuitton mermaid silk organza gown, which took 1000 hours to make and had 650 embroideries and 3-D scalloped petals emblazoned all over.

Lady Gaga's black long-sleeved gown revealed her underwear free form - with her bare derriere on full display in the see-through number.

The sheer number also revealed her midriff and her arms; the dress had a pointed bralette and low-slung skirt with a belt detail. 

Lady Gaga, born Stefani Joanne Angelina Germanotta, added a diamond choker, bracelet, rings and earrings with smokey black eye makeup and a bright orange-red lip; the 36-year-old star wore her blonde hair back into a tight bun. 

Rihanna made quite the entrance as she showcased her pregnant belly on the Oscars red carpet; she revealed her second pregnancy during her Super Bowl Halftime show on February 12.

The artist is expecting baby number two with partner A$AP Rocky; they are also parents to a 10-month old son. They have not yet revealed his name.

Rihanna, 35, looked incredible in a custom chocolate colored Alaïa gown with a leather halter crop top and matching woven skirt; the long-sleeved turtleneck sheer gown put her baby bump on full display.

The stunning frock had cut-out detailing along each hip for a flash of skin to complete the eye-catching look.

Rihanna wore her brunette locks pulled up into a high bun, wearing drop earrings, red lipstick and smokey eye makeup. 

Salma Hayek, 56, looked beautiful in a bold sequin Gucci number; the orange form-fitting gown put her curvaceous figure on full display.

It featured a fringed skirt with a keyhole detail along her chest, flashing her ample cleavage.

The brunette beauty wore her hair loose in waves with pink hued lipstick, adding a gold clutch and statement jewelry. 

She posed on the red carpet with her daughter Valentina Paloma Pinault, 15, who also wore a Gucci frock. 

Ana de Armas, star of the Marilyn Monroe project Blonde, channeled the old Hollywood star in her striking sequin silver number by Louis Vuitton. 

The star, 34, flashed her cleavage in the low-cut number, which also had a mermaid skirt and sequin accents throughout. 

Jessica Chastain sizzled in a custom silver and black Gucci gown, paired with Gucci diamond and emerald jewelry.

The flame-haired beauty showcased her incredible figure in the strapless dress with a low-cut neckline; the dress featured crystal sequins embroidered all over.

Jessica rocked crimson lipstick with smokey eye makeup, opting for old Hollywood waves in her long hair to round out her glam look.

Eva Longoria, Ariana DeBose and Michelle Williams all donned white gowns with shimmering accents while Kate Hudson chose a bold sparkling silver look. Eva wore Zuhair Murad, Ariana chose Versace and Michelle in Chanel couture with Tiffany & Co. jewels.

Kate Hudson donned a shimmering number with a criss-cross neckline and draped sleeves; she is wearing custom Rodarte. 

Halle Berry showcased her chiseled form in a white thigh-slit Tamara Ralph gown featuring rose gold roses along the neckline and her upper thigh. 

The 56-year-old movie star wore champagne colored platform heels and her short hair curled with a deep side part.

Mindy Kaling looked incredible in a white Vera Wang cut-out gown with corset boning along her torso, with Emily Blunt in Valentino, Michelle Yeoh in Dior Couture and Zoe Saldana in Fendi. 

Rooney Mara and Andrea Riseborough also wore white, opting for striking looks; Rooney is wearing Givenchy with Fred Leighton jewels and Stuart Weitzman heels and Andrea is in Alexander McQueen.

Jamie Lee Curtis donned a cream colored Dolce & Gabbana number with corset boning along her torso and Eva Longoria in a white and silver plunging gown. 

Florence Pugh chose a Valentino look and heels; it featured a taupe colored open gown with black hot pants beneath for a youthful take on Oscars fashion. 

Incredible: Jessica Chastain sizzled in a custom silver and black Gucci 
gown, paired with Gucci diamond and emerald jewelry

A vision! The flame-haired beauty showcased her incredible figure in the strapless dress with a low-cut neckline; the dress featured crystal sequins embroidered all over