LL Cool J says he won't perform at Wawa Welcome America in Philadelphia until the city and the largest municipal workers' union come to an agreement amid an ongoing strike.

LL Cool J cancels Philly July 4 concert appearance on Benjamin Franklin Parkway in support of city union 33 strike

In this life we are only measured by how we uphold our morals and standards, by what we choose to fight for through participation or protest,” she wrote on her Instagram story.