Yes they are. These people obviously havent been doing research. IN an interview with sugar magazinge Demi called miley her best friend and before miley shut down twitter Miley would always call demi her best friend. Miley and Mandy used to be best Friends but Miley realized that Mandy was using her for fame..if toi do research online toi will realize that demi and selena have been fighting for over a an now and Selena is Best Friends with Taylor Swift.