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The 'Sleazy' singer was in Australia and decided to fly to Rihanna's Melbourne show on Tuesday to hook up -- literally -- with Scottish DJ Calvin Harris, whom Kesha supported during his 2009 UK tour. Harris, who is currently supporting Rihanna on her Last Girl on Earth tour, was joined by Kesha at the Rod Laver Arena Tuesday night. The two were spotted all over one another and eventually left the show early.
"They were getting right into it," said sources to the Melbourne Herald Sun. "They were practically fornicating. They were all over each other and didn't care who was watching."
The 'Blow' singer is never bashful when it comes to sex and recently announced that her face would be on 10,000 condoms -- most of which will be handed out at her shows.
Kesha, currently on her Get Sleazy tour, also joined Rihanna during her summer US tour last year. In between sexing things up on tour, Kesha recently penned Britney Spears' second single 'Till The World Ends' and announced that she's working on a dance remix album.
Watch Kesha's 'We R Who We R' video.