"There’s absolutely no way that I can perform, cross a picket line and pick up money when I know that people are out there fighting for a living wage," LL Cool J said.

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.

A sour note for Philly's Party on the Parkway. Both headliners of the Wawa Welcome America Fourth of July concert, LL Cool J and Jazmine Sullivan, have canceled their performances, refusing to cross the picket line as the strike by thousands of city workers stretches into its fourth day.