Lady Gaga gave the performance of the night at the 88th Academy Awards.
Gaga was nominated for an Oscar tonight for Best Original Song along with co-writer Diane Warren for her ballad 'Til It Happens To You'.
The song features in documentary, The Hunting Ground, about sexual assault and rape on university campuses in America.
While the song did not take home the award, Gaga's performance stole the show.
Gaga was joined on stage by victims of sexual assault, sporting slogans written on their arms like "Not your fault".
US Vice President Joe Biden introduced the incredible performance by Gaga, encouraging all audience members and viewers to "take the pledge" to fight on-campus sexual assault.
"We must and we can change the culture so that no abused woman or man, like the survivors you will see tonight, never have to ask themselves, 'What did I do?' They did nothing wrong," he declared.
Watch the performance here: (post continues after video)
Gaga attended the Oscars ceremony tonight with her finace Taylor Kinney tonight. She posted this moving post on her Instagram.
"I never thought anyone would ever love me because I felt like my body was ruined by my abuser," She wrote. "But he loves the survivor in me. He's stood by me all night proud and unashamedly. THAT'S a real man."
Gaga has previously spoken openly about her sexual assault, saying "I didn’t know how to not blame myself or think it was my fault. It’s something that really changed my life. It changed who I was completely. It changed my body, it changed my thoughts."