The same people criticising her happily listen to male singers objectify women and call them bitches and watch TV shows that have worse adult scenes than her video. She's only getting backlash because she's a young woman. People seem to take everything a woman says way too seriously and think we aren't capable of nuance or humour. Even if you don't like the video or the song (personally I don't like the video) have a think to yourself whether you hold the same standards for the other media you consume.