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Justin Bieber Singing With Sister (Video)

Video: Watch Justin Bieber Sing on Stage With His Adorable Little Sister

Justin Bieber has performed with everyone from Usher to Mariah Carey, but he had a very special guest at his Christmas concert last night — his 3-year-old sister Jazmyn! Watch as Justin and Jazmyn duet on his hits "Baby" and "One Time" in today's PopSugar Rush.

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