I don't watch award shows (zzzzz), but I do like to see what the various actresses wore to the Oscars. Fortunately, that's all available the next morning, so you don't have to watch.
Renee Zellweger was amazing, poured into a Carolina Herrera; Helena Bonham Carter was her usual hot mess. Among my favorites: Emmanuelle Riva in a quiet, elegant Lanvin:

Robin Roberts in electric blue:

And the little girl whose name I can't pronounce, up for best actress, wearing Armani Junior and rockin' a puppy purse: