The girl was accompanied by her famous father and by her mother, Jada Pinkett Smith, during a visit to New York's BET studios, where she aired the video for her debut single, "Whip My Hair," on "106 & Park."
The program's hosts then handed Willow a plaque congratulating her on her first world premiere, and the young singer broke down in tears as she admired the prize.
The video, which was leaked online early Monday ahead of its official premiere, has attracted a lot of attention on the Web. It has already been viewed more than 590,000 times on YouTube.
Willow, who was signed to Jay-Z's label last month, will be on "The Ellen DeGeneres Show" on Nov. 2.
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