From the beauty of the Tiffany diamond to a glorious influx of pink, stars brought their red carpet A-game to celebrate Hollywood's biggest night.

Just like that, awards season had its grand finale with the Oscars. The hostless show&nbsp;went fairly smoothly, and an opening monologue by the iconic trio of&nbsp;Tina Fey, Amy Poehler, and Maya Rudolph preceded an eventful night, ranging from Lady Gaga and Bradley Cooper&#39;s steamy performance of &quot;Shallow&quot; from A Star is Born&nbsp;to Olivia Colman&#39;s adorably surprised Best Actress acceptance speech.&nbsp;But as always, another show in itself had happened on the red carpet, as celebrities made an impression with their final awards looks of the season.

One of the most iconic looks of the night came from Billy Porter, who donned a showstopping tuxedo gown by Christian Siriano. And though Gaga&#39;s black Alexander McQueen number&nbsp;was understated in comparison to her Valentino gown from the Golden Globes, she looked every bit a&nbsp;classic Hollywood icon&nbsp;and even became the third person&nbsp;ever&nbsp;to wear the <a href="https://www.lofficielusa.com/fashion/lady-gaga-oscars-tiffany-diamond-2019" target="_blank">Tiffany Diamond</a>. Other notable moments included a trend of pink looks, Glenn Close&#39;s golden Carolina Herrera cape, and Nicholas Hoult and Joe Alwyn posing together in impeccably tailored suits by Dior and Tom Ford. See who won the pre-show competition in the gallery below.

Kacey Musgraves in Giambattista Valli

Billy Porter in Christian Siriano

Lady Gaga in Alexander McQueen and the Tiffany diamond

Glenn Close in Carolina Herrera

Gemma Chan in Valentino

Nicholas Hoult in Dior and Joe Alwyn in Tom Ford

Constance Wu in Versace

Brie Larson in Celine

Lucy Boynton in Rodarte and Rami Malek in Saint Laurent

Elsie Fisher in Thom Browne

Amandla Stenberg in Miu Miu

Jason Momoa in Fendi

Tessa Thompson in Chanel

Awkwafina in DSquared2

Laura Harrier in Louis Vuitton

Rachel Weisz in Givenchy

Regina King in Oscar de la Renta

Emilia Clarke in Balmain

Danai Gurira in Brock Collection

Allison Janney in Pamela Roland

Marina de Tavira in J.Mendel

Angela Bassett in Reem Acra

Michelle Yeoh in Elie Saab

Yalitza Aparicio in Rodarte

Henry Golding in Ralph Lauren

Spike Lee in Ozwald Boateng

Sarah Paulson in Brandon Maxwell

Ashley Graham in Zac Posen

Elaine Welteroth in Celia Kritharioti

Zuri Hall in Ong Oaj Pairam

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