Initially released in September 2011, Carly Rae Jepsen's 'Call Me Maybe' has just recently become a chart-topping hit song.
Beginning with an impressively choreographed video by the Harvard baseball team, lip dubs and cover versions of 'Call Me Maybe' on YouTube have shot through the roof.
This week, a mashup of Barack Obama "singing" 'Call Me Maybe' and a lip dub done by the Miami Dolphins cheerleaders have taken over YouTube.
Find out what this 'Call Me Maybe' craze is all about and check out this week's most watched videos on YouTube.
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