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 won't perform in the Wawa Welcome America Fourth of July Concert in Philadelphia, saying he won't "cross a picket line" amid the ongoing strike involving the city's largest municipal workers' union.

LL Cool J is pulling out of a Fourth of July concert in Philadelphia in solidarity with city workers unionized with District Council 33, who went on strike on Tuesday after the AFSCME union failed to reach a deal with the city.