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Who played referee for the Lady GaGa and Kelly Osbourne feud? None other than Sir Elton John. The two divas had been going at it for five years, but the battle officially ended at Elton John's annual Oscar viewing party on March 2.

Osbourne, 29, shared the proof of the peacemaking on her Instagram account with a photo of herself pretending to choke out GaGa, 27. Elton John, 66, was there, as well, to make sure the two kept it civil. Captioning "#peace at last @ladygaga," Osbourne let the world know that her feud with the "Applause" singer has come to an end.

According the Us Magazine, Sharon Osbourne, 61, told her daughter at the Oscar party that GaGa and John were "just looking for you to come and say hi." The rest is Oscars history. The feud was over, the two hugged it out and made Instagram proud with their photo.

This whole war between Osbourne and GaGa started when the television host called the "Do What U Want" singer a "butterface" in 2009, and then called her out again in the July 2013 issue of Cosmopolitan for being a "hypocrite."

The feud unofficially ended in October 2013, when Osbourne tweeted to GaGa: "@ladygaga I acted like a child last night. Just not into publicity stunts call me & we will end this like adults I don't want 2 fight anymore." Now the two are joking about the entire ordeal with John cheering them on.