I loved M.I.A. appearing very pregnant in a notice-my-pregnancy outfit, and was grossed out by the Grammy producers' obvious discomfort with her pregnancy as the camera got away from her as quickly as possible.
And Katy Perry's performance settled the question of "I Kissed a Girl"'s nature (if a question still existed). As she and hot girls danced around each other, she presented the notion of women kissing as a Howard Stern fantasy.
... and he's not a woman, so technically, he doesn't belong in this post, but what was up with McCartney's hair color? When you're in your 60s and your hair is suddenly darker than the Jonas Brothers', you've chosen a shade too dark.