The musician performed Over the Rainbow from The Wizard of Oz as her husband, Kanye West, looked on.
The 36-year-old actor required hospital treatment after a suspected racist and homophobic attack in Chicago last month.
The 46-year-old shared a photo on Instagram as he returned hone from his trip to see his "number one valentine" his 17-year-old daughter, Simone.
On Tuesday, the academy said the winning speeches for four of the categories would be aired in a shortened, taped segment during the broadcast.
The 34-year-old singer took to Instagram to show off her stunning pink diamond floral-shaped ring in a selfie of herself with Bloom, 42.