Is the only reason for mileys fame becuase she is a 'copy cat'?

Miley Cyrus has been recently known as a 'copy cat' after copying Madonna’s '4 minute' song to make it her own, is she now trying to copy beyonce? This is Miley Cyrus shooting the music video for her new song 'The Best of Both Worlds' on the beach in Malibu which seams to be very similar to beyonces baby boy video.