Katy Perry and Rihanna have been keeping their distance from one another for months now – but it seems that the old pals could be getting friendly again. Last night, Katy tweeted the Diamond’s singer and appeared to joke about how she should feel that she missed her when she was visiting LA. "Ermm... I was in LA Saturday night... Should I be proud or offended I wasn't invited @rihanna. The 25-year-old wrote back almost immediately, denying her visit but joking that she would still get a tad ‘kinky’ with the Bajan. "@katyperry errm I wasn't! Lol! #miaminights howeverrrrr....I'll still let you spank me!" The Teenage Dreams singer hit straight back, writing: "Don't worry @rihanna I'll make it up to you at Barclays.." "Or more like let you make it up to me... Hehehe @rihanna" Well, well, well. This public contact is a rare sight as the girls have rarely spoken in public since it was alleged that Katy was annoyed about Rihanna’s on-off relationship with Chris Brown. When asked back in November if she had spoken to he, the 28-year-old appeared frosty when asked about Ri – appearing to have no idea how her mate was getting on.