"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.

LL Cool J and Jazmine Sullivan canceled their Philadelphia July 4th concert appearances to support striking municipal workers.

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.