Rihanna thinks gay people are going to hell.
The singer lashed back at a gay fan on Instagram last night, after the guy replied to one of her birthday cake photos.
The fan wrote, "Rihanna u going to hell girl." And Rihanna responded, "Arnt you gay? ... Nuff said blah!" The comment has since been deleted.
Pretty crazy, considering Rihanna voiced her support for gay rights in Russia less than a week ago -- posting a photo of herself wearing a hat embroidered with "P6," which stands for Principle 6 ... a campaign against Russia's anti-gay propaganda law.
Rihanna's been on a roll lately ... 'memba her lesbianic music video with Shakira? And let's not forget the leather lip picture .
Calls to Rihanna's camp weren't returned.
