Why does Shakira hate Jehovah's Witnesses?

She doesn't necessarily hate Jehovah's Witnesses, she just asks them to leave at her shows/concerts because supposedly, she can't perform well when they're around. She likely knows how JWs hold morals in high regard and knows that her songs and provocative dancing might offend them.

A quick search on google gives credence to the belief that this is most probably an urban myth. It seems more likely that she has never said anything about Jehovah's Witnesses.