PHILADELPHIA (CBS) — One of the big acts for Friday’s “Welcome America Concert” has cancelled.

Because of unforeseen personal circumstances, Ariana Grande will not be able to perform, according to the Wawa Welcome America Twitter account.

The biggest free concert in the U.S. stars Philadelphia’s own The Roots, plus Nikki Minaj and Jennifer Hudson, along with even more special guests.

READ: Guide To The 2014 Wawa Welcome America! Festival

After the music winds down, the fabulous fireworks start up over the Art Museum.

For more information on the Wawa Welcome America! Festival, click here.

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