Mariah Carey Does July 4 on NBC

When the United States turns 229 years old, who does NBC call to help celebrate?

Mariah Carey -- the most successful female artist of all time.

Carey is the exclusive musical guest on NBC's annual "Macy's Fourth of July Fireworks Spectacular" and, during the live telecast from New York, Carey will entertain the audience with songs from her new album, "The Emancipation of Mimi."

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Mariah Carey