Demi Lovato discusses the solid friendship she has with Ariana Grande in a new interview with Harper's BAZAAR.The "I Love Me" singer describes their pairing as "supportive.""The whole world seems to want to pit women against each other," Lovato says.Demi Lovato has been in the entertainment industry for a long time, and she's made some firm friends along the way.Opening up in a new interview with Harper's BAZAAR, Lovato explains why her friendship with fellow singer Ariana Grande continues to