Jennifer Lopez and Alex Rodriguez joined thousands of protesters at a Black Lives Matter rally in Los Angeles on Sunday (June 7, 2020), armed with posters made by her kids.The On the Floor hitmaker and her fiance were among the stars demanding justice for George Floyd, almost two weeks after the African-American man was killed at the hands of a white police officer in Minnesota.J.Lo documented their participation on Instagram, and revealed she had recruited her 12-year-old twins, Max and Emme,