J.Lo included the controversial hashtag used to undermine the Black Lives Matter movement on a tweet with a picture of her performing her song "Love Makes the World Go Round," a collaboration for victims of the Orlando shooting with Lin-Manuel "Non-Stop" Miranda.
The fact that she quickly deleted it means:
A) She was embarrassed about getting backlash for her racist views OR
B) She isn't racist but oblivious to what that hashtag actually means.
Twitter called her out on her complete ignorance either way.