Katharine McPhee's rendition of the National Anthem is a total, well, smash!

The American Idol alum and Smash star popped up at New York City's Bryant Park Tuesday for the unveiling of Tide's 6,000-square foot American Flag and totally rocked the house. 

The special flag, which is a part of Tide's "My Story. Our Flag" project, features personal stories about what the red, white and blue colors of the American Flag mean to people across the nation.

Not a bad way to kick off the Fourth of July!

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