"Instagram is my way of communicating to the world. When I'm on tour, I keep fans in the loop. I don't really think about it too much. Literally, I can be sitting in a car and be bored, so I do a selfie just because I'm bored. Or if my dog is running around in circles and I think that's funny, I put it on Instagram." Rihanna on her addiction to the popular photo sharing app.