Ke$ha attended a Rihanna concert in Melbourne this week... but witnesses say she wasn't exactly singing along to "S&M" or any other hit singles.
The eccentric singer was spotted in the front row of the event, "all over" Scottish artist Calvin Harris, according to onlookers. One told The Melbourne Herald Sun:
"They were getting right into it. They were practically fornicating."
The burgeoning couple left the show early together, sources say, as "they were all over each other and didn't care who was watching. Ke$ha is a bit of an animal, but Calvin reckons he can handle her."
His subesquent Tweet the next day implied as much: "2nd Melbourne show with Rihanna went great! Lots of people in town for Future festival too so was a fun night!"
[Photos: Fame, WENN.com]