Britney Spears in Michael Cinco Couture (AP/Invision)
Kourtney Kardashian in Brian Rennie for Basler gown (AP/Invision)
Heidi Klum in Julien Macdonald (AP/Invision)
Nicole Richie in Roberto Cavalli (AP/Invision)
Emma Roberts looked lovely in an Oscar de la Renta dress. (AP/Invision)
Emmy Rossum in Catherine Deane (AP/Invision)
Carmen Electra (AP/Invision)
Kelly Osbourne (AP/Invision)
Nicki Minaj (AP/Invision)
Molly Sims (AP/Invision)
Naomi Watts (AP/Invision)
Kristen wearings Fred Leighton 19th Century rose gold and old mine cut diamond riviere necklace and rose gold and old mine diamond navette shaped ring -- stunning!
Jennifer made sure to accessorize the dress with Fred Leighton jewels and a Salvatore Ferragamo clutch.
Jennifer celebrated her husband's big night with a custom Gucci gown, Neil Lane jewelry and a Roger Vivier clutch.
Reese opted for a Louis Vuitton dress and jewelry which she sweetly said her daughter Ava helped pick out: ""I love the color of it. My daughter and I picked it out.She said, this is a winner. She's 13, so she definitely weighs in. She helps me pick the jewelry, makeup and everything."
Jennifer Lawrence tripped on stage but she looked flawless in her Dior Haute Couture ball gown, and her Chopard necklace.
Anne Hathaway made a last minute choice to wear a Prada gown with a very low back and she matched it with a Tiffany & Co. necklace and pink Roger Vivier clutch. (Invision/AP Images)
Catherine Zeta Jones Lorraine Schwartz opted to wear gold earrings with earth tone colored natural diamonds. (Invision/AP Images)
Jessica Chastain wore a Harry Winston vintage 1967 diamond and yellow gold bracelet. (Invision/AP Images)
Samantha Barks wore House of Waris for Forevermark Light Emanating from the Heart pendant in 18k yellow gold with Oval Forevermark diamond. (Invision/AP Images)
Renee Zellweger wore a gorgeous Van Cleef & Arpel "Mystery Set" bracelet with rubies and diamonds in platinum and yellow gold, 1960 "Twin Ruby" bracelets with diamonds set in platinum and yellow gold, and 1945 yellow gold Minaudiere with diamonds, rubies, and sapphires. (Invision/AP Images)
Jenna Dewan Tatum wore a Rachel Roy gown, Irene Neuwirth jewelry and Brian Atwood shoes. (Invision/AP Images)