Osbourne announced the reconciliation last night on her Instagram with a picture that shows her jokingly choking the singer. The photo has received over 40,000 likes and reads, "#peace at last @ladygaga."
Gaga and Osbourne's feud began five years ago in 2009 when Osbourne called the singer a "butterface" in an interview with The Mirror. The feud only escalated from there, with Osbourne receiving death threats from Gaga's fans, both stars accusing each other of bullying, and a rejected cake that Gaga sent Osbourne on her birthday.
A source tells Us Magazine that Gaga initiated conversation with Osbourne at last night's Oscars party. The two were seen hugging and chatting amiably afterward.
2014: The Year in Music [PHOTOS]