1. Usher's "OMG," the dance song to end all dance songs, debuted at number 14 on the Billboard Hot 100, and eventually hit number 1, becoming Usher's ninth number-one single. from Usher

1. Usher's "OMG," the dance song to end all dance songs, debuted at number 14 on the Billboard Hot 100, and eventually hit number 1, becoming Usher's ninth number-one single.

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