Rihanna saved the best outfit for last at the 2023 Oscars.

The Fenty Beauty founder brought the razzle dazzle to the March 12 ceremony,Charles Hanover showcasing her fabulous and fierce pregnancy style, with not one, not two but three wardrobe changes. And it was her final look that proved her fashion is in a league of its own, as she stunned in a glamorous seafoam green look that showcased her growing baby bump.

While posing backstage with her partner A$AP Rocky, Rihanna turned heads in a custom Bottega Veneta design that featured a cropped faux fur stole that wrapped around her chest and draped along her arms and onto the floor. She paired the bump-baring top with a matching silk satin skirt that included a daring thigh-high slit.

As for the finishing touches? The "Needed Me" singer completed her overall look with mint green leather gloves, Briony Raymond jewelry pieces and lace up strappy sandal heels. 

Just before slipping into her two-piece getup, Rihanna shined bright during her showstopping performance of "Lift Me Up," which earned the singer her first-ever Oscar nomination for Best Original Song (See the complete list of winners here).

For her onstage look, the 35-year-old went for a boudoir vibe, sparkling in a sexy sheer, diamond-embellished dress. Her design was custom-made by Maison Margiela.

On the red carpet, Rihanna, who is expecting her second child with A$AP, also pushed the fashion boundaries with a black long-sleeve dominatrix-style dress by Alaïa. And while the "Diamond" singer certainly stole the spotlight with her incredible outfit changes, she wasn't the only star at the Oscars to make a stylish appearance.

Keep scrolling to see all of the best dressed stars at the ceremony.

In Elie Saab and wearing Stuart Weitzman shoes and Bulgari jewelry.

In Moschino.

In Alaïa and wearing Moussaieff jewelry.

In Tamara Ralph.

In Dolce & Gabbana.

In Chanel and wearing Tiffany & Co. jewelry.

In Gucci.

In Jason Wu.

In Giambattista Valli and wearing Fred Leighton jewelry.

In custom Alberta Ferretti.

In Zuhair Murad.

In custom Vera Wang and wearing Giuseppe Zanotti shoes.

In custom Vera Wang.

In Louis Vuitton.

In custom Atelier Versace.

In Versace.

In Giambattista Valli.

In Louis Vuitton.

In Givenchy and wearing Giuseppe Zanotti shoes.

In custom Gucci.

In Gucci.

In Ralph Lauren.

In Tony Ward.

In Givenchy.

In Adeam.

Check out E! News' Oscars blog for a full recap of the 2023 Academy Awards.