Lady Gaga has tweeted her excitement at joining Queen and Adam Lambert on stage in Australia.
The Applause star, whose performance name was inspired by the Queen hit Radio Ga Ga, arrived on stage for Another One Bites The Dust at Queen's Sydney date.
She tweeted: "I just played with Queen I'm the happiest girl alive! #QAL," and then Instagrammed photos of herself with Brian May and Adam Lambert.
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Brian was equally thrilled to meet Lady Gaga and took a photo with his selfie stick, which he tweeted, captioned: "My stick selfie of the day - with our lovely guest Lady Gaga XXX BRI."
Lady Gaga also revealed that Brian and Adam had been to her artRAVE ball and said: " I'm so PROUD of Adam Lambert singing with them. Made me cry during Dope when I saw them all sitting there. ... I thought about Freddie.
"I returned to the Radio GaGa mothership to pay homage to my leaders. It was emotional and wild."