They're so close he even let's her take pictures of him on the loo. Well, sorta.
You might think that Justin Bieber and Rihanna are pretty much polar opposites in the gravity-defying spectrum of pop music, but apparently in the world of celeb that makes them all the more likely to be pals. Well, sort of anyway.
So what do these two get up to when they hang out then? Oh the usual - kissing each other's faces, making bad-ass rapper signs together and then of course there was that time they took some snaps of each other on the toilet. Err...
Ok, we might be slightly exaggerating, but it does look like Rihanna is a bit of a fan, especially after she posted several pictures of her and a friend in a mask of El Biebo's face on Twitter.
Being friends with loads of celebs, the presence of Justin obviously didn't phase her and she tweeted, saying: "Me and the Beebs yesterday!" [sic]
Oh RiRi, you might be down with el Biebo, but we doubt he'll be over the moon if you spell his name wrong on his Christmas card. Now practise that 5 times and we'll give you a vocab test next time we see you.
But what do you think? Would you like to see Rihanna and the Biebster hanging out for real? Comments below please!
Images: Rihanna / Instagram