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Page last updated at 06:52 GMT, Thursday, 19 April 2012 07:52 UK
Carly Rae Jepsen has told Newsbeat about the moment that she found out she had achieved a number one single in the UK.
The singer also reveals how she was forced to keep a record deal with Justin Bieber secret from her friends and family.
The former Canadian Idol contestant sold 100,000 singles in a week after a viral video showing Justin Bieber and Selena Gomez dancing to the track received 31 million YouTube views.
Jepsen came third when she competed in Canadian Idol in 2007.
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