POP tramp Ke$ha made a surprise visit to Melbourne to engage in a public display of affection at a Rihanna concert.
The Tik Tok singer was seen locking lips and limbs with RiRi's support act, Brit singer and DJ Calvin Harris.
Ke$ha flew in to Melbourne early ahead of her gig at Festival Hall last night.
Ke$ha, without her trademark bleary make-up but looking her usual scruffy self, was seen mingling backstage before Rihanna took to the stage.
She then took her second-row seat in the crowd, next to Harris.
"They were getting right into it," our spy said. "They were practically fornicating."
Rihanna even did a shout-out to Ke$ha from the stage, but the hot and heavy-handed couple had already left their seats to er, Take It Off?
It's not the first time the pair, who toured Britain together in 2009, have been in the same place at the same time recently.
Both are clearly making the most of their trip Down Under.
They were in Sydney during Mardi Gras last weekend. The pair then caught up again in Melbourne, with Harris flying to Adelaide today for his next concert with Rihanna.
They will be back in Melbourne on Sunday, with Ke$ha headlining the Future Music Festival, and will no doubt be seen mingling in The First Class Lounge with VIPs including Simone Callahan and boyfriend Toby Roberts, Ashley Hart and Jesinta Campbell.
Harris certainly seems to have enjoyed his night out.
"2nd Melbourne show with Rihanna went great! Lots of people in town for Future festival too so was a fun night!" he tweeted yesterday.
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Could this be true?
I thought Calvin had a girlfriend
