Famous friendships that have cooled

Rihanna and Katy Perry were closer than close, as this picture taken at last year's MTV Awards proves. But the BFFs haven’t been photographed together ever since RiRi reunited with Chris Brown, prompting suggestions that Katy isn’t best pleased about their reunion.

Time will tell if the pair will get over the apparent rift, but Katy tweeted a birthday message to Rihanna last week so it seems all is not lost!

See other famous friends who’ve fallen out in our photo gallery…