New couple: RiRi spotted getting seriously flirty with this A-lister!

Now these are two stars we would never have put together, but sometimes the world works in strange ways!

Rihanna attended a birthday party for designer NIkki Erwin at the Playboy Mansion over the weekend and she was seen getting seriously flirty with none other than… Leonardo Di Caprio! 

Bizarre or wha'?!

Reports have even emerged of the pair kissing on the dance floor in view of attendees like Paris Hilton, Tobey Maguire and Hilary Duff. One onlooker tweeted, "Just saw Leo and Rihanna makeout while ‘pour it up’ was playing. What is this life." TMZ also claimed that RiRi and Leo were seen "swapping spit" (ew).

However a source close to Rihanna has apparently denied any actual PDAs took place between the two stars – even though similar reports emerged after the pair ended up in the same club in St Barts on New Year's Eve. 

"She definitely did not make out with Leo and nothing went on," one insider told Us Weekly, while another said the pair engaged in some "innocent flirting at most".

So who's telling the truth?! Well whatever happened, it sounds like the pair had a pretty epic night after leaving the Playboy Mansion, with many revellers heading back to Leo's Los Angeles home for an afterparty. 

This isn't the first time Rihanna has been linked to an unlikely partner – in the past there have been rumours of hook-ups with Sisqo, Shia Le Beouf and an array of sports stars.