Berry, who won the Best Actress in a Leading Role for Monster's Ball in 2001, turned heads wearing a custom Versace dress, Adeler earrings, a Le Vian ring and Jimmy Choo's "Vibe" platform sandal.
Bullock, who won the Best Actress in a Leading Role for The Blind Side in 2010 (the same year she became a mom and a single woman), rocked a fully-embroidered cap-sleeve gown by Elie Saab and Harry Winston jewels.
The Impossible's Naomi Watts, who lost the Best Actress in a Leading Role to Silver Linings Playbook's Jennifer Lawrence, looked fashion-forward wearing an Armani Prive gown, Neil Lane jewels and Jimmy Choo sandals. Other stars who wore embellished dresses included George Clooney's love Stacy Keibler (Naeem Khan), Catherine Zeta-Jones (Zuhair Murad) and Salma Hayek (Alexander McQueen).
Tell Us: Who was the best-dressed star at the Oscars?
Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!