'Party In The U.S.A' by Miley Cyrus - 54+ million views
'Hannah Montana' star Miley Cyrus' second song of 2009 was an upbeat pop track, released as the lead single to promote the teen's EP 'Time of Our Lives'.
It was an international success, and was the 'Grease' inspired music video, making it the third most popular music video of the year.
Watch Miley Cyrus party here:
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