The 2019 Academy Awards: Top 10 memorable moments from the Oscars

Lady Gaga and Bradley Cooper perform the song "Shallow" from "A Star Is Born." (Image: Reuters)

Spike Lee (L) embraces presenter Samuel L Jackson as he wins the Adapted Screenplay award for "BlacKkKlansman." (Image: Reuters)

Alfonso Cuaron of Mexico poses backstage with his Best Director, Best Foreign Language Film and Best Cinematography awards for his film "Roma". (Image: Reuters)

Adam Lambert performs with the band Queen. (Image: Reuters)

Melissa McCarthy presents the Best Costume Design award. (Image: Reuters)

Best Actor Rami Malek, Best Actress Olivia Colman, Best Supporting Actress Regina King and Best Supporting Actor Mahershala Ali pose with their awards backstage. (Image: Reuters)

Keegan Michael Key drops down to announce the Mary Poppins performance. (Image: Reuters)

"Green Book" producers Jim Burke, Charles Wessler, Nick Vallelonga, Peter Farrelly and Brian Hayes Currie pose backstage with their Best Picture awards. (Image: Reuters)

Olivia Colman accepts the Best Actress award for her role in "The Favourite." (Image: Reuters)

Stan Lee is displayed during the In Memoriam presentation. (Image: Reuters)