Winners!
Best Supporting Actor
Best Supporting Actress
Best Art Direction
Best Costume Design
Best Animated Feature
Best Original Score
Best Original Song
Best Sound Editing
Best Sound Mixing
Best Documentary
Best Foreign Language Film
Best Visual Effects
Best Make-Up
Best Cinematography
Best Editing
Best Original Screenplay
Best Adapted Screenplay
Best Actress
Best Actor (tie)
Best Director
Best Picture
Should've Been Nominated
+ The Artist leads with 4 wins (Picture, Director, Editing and Actor). I would do the voting breakdown for BP but it's kind of pointless this year cause The Artist won after like 2 rounds.
+ The widest margins of victory were Christopher Plummer for supporting actor and A Separation for foreign film.
+ Runners-up for "Should have been nominated" were We Need to Talk About Kevin and Shame.