Oscars 2015: Lady Gaga's 'The Sound of Music' Medley Dominated Social Media

Oscars 2015 lady gaga julie andrews H
John Shearer/Invision/AP

Graham Moore's moving speech also lit up Facebook, Shazam's top-queried performance was Adam Levine's "Lost Stars" and Twitter's most mentioned movies were 'Birdman' and 'The Grand Budapest Hotel.'

Who won the Oscars on social media? According to social media, it was none other than Lady Gaga.

When she hit the high notes on four songs as part of a 50th-anniversary tribute to The Sound of Music and shared a hug with its star Julie Andrews, Facebook and Twitter experienced their highest activity of the night.

On Facebook, the performance triggered show-related interactions from 214,000 people per minute globally, and 154,000 people per minute in the U.S. Stars Bette Midler, Julia Louis-Dreyfus and Kate Upton shared their Gaga sentiments on Twitter.

Twenty-one million global Facebook users had 58 million Oscar-related interactions on Sunday. Following Gaga in the moments spurring top activity were Graham Moore's moving speech upon winning the best adapted screenplay Oscar for The Imitation Game, and Alejandro G. Inarritu's humorous podium moment about Michael Keaton's undies being his good-luck charm. See below for how the awards show unfolded on Facebook, state by state.

After Gaga's medley, Twitter users (who sent 5.9 million show-related tweets that were seen by a unique audience of 13 million people, according to Nielsen Twitter TV Ratings) were also buzzing about the final award of the night — best picture, presented to Inarritu's Birdmanas well as the mobilizing acceptance speech made by Boyhood's Patricia Arquette when she won best supporting actress and made a statement about wage equality that got Meryl Streep and Jennifer Lopez visibly excited.

The most mentioned people on Twitter were Gaga, Arquette and John Legend, as the latter brought tears to David Oyelowo and Chris Pine's eyes with his performance of "Glory" with Common and made an enlightening original song acceptance speech on the stark state of America. The most mentioned movies of the night were Birdman, The Grand Budapest Hotel and Boyhood, while the most popular figures on the red carpet were Dakota Johnson, Gaga, Lupita Nyong'o, Lopez and Rosamund Pike.

See how Twitter reacted to the broadcast internationally.

On Shazam, Adam Levine's performance with Maroon 5 of "Lost Stars" from Begin Again collected the most queries, followed by Rita Ora's "Grateful" from Beyond the Lights, Tim McGraw's rendition of "I'm Not Gonna Miss You" from Glen Campbell ... I'll Be Me, Jennifer Hudson's "I Can't Let Go" during the In Memoriam tribute, Legend and Common's moving "Glory" performance from Selma, Gaga's Sound of Music medley and "Everything Is Awesome" from The Lego Movie, performed by Tegan and Sara and The Lonely Island.

Twitter: @cashleelee