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12!
Justin Bieber did not write the song "One Time" -- he sung it. He was 15 years old when the song was released.
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Earn +20 ptsQ: How old was Justin Bieber when he sang one thime?
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Continue Learning about TV & Celebs
How old was Justin Bieber when he had his 1st hit?
Justin bieber was 14
How old will justin bieber be in 11 Years?
justin bieber will be 27 in 11 years
How old was Selena Gomez when she meet Justin bieber?
Justin bieber was 16 yeards old when he meet Selena Gomez , (Justin bieber and Selena Gomez is married together!)
How old is Justin Bieber's girlfriend?
Justin Bieber's girlfriend, Selena Gomez, is 20 years old (birthdate: July 22, 1992).
How old was Justin Bieber when he first became a siner?
Justin Bieber was very young when he began to sing.
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