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Calvin Harris has officially entered the world of rich youngsters.  The electronic music star comes in at number four in his debut on "Forbes'" list of the Top-Earning Celebrities Under 30. 

The publication says Harris raked in $46 million between June 2012 and June 2013.  Most of that came from his live performances, which included more than 150 shows during the 12-month period in question. 

And back in February, he signed a deal to play more than 70 shows in Las Vegas over the next two years.  But Harris also earns a hefty sum from writing and producing songs like Rihanna's Grammy-winning hit "We Found Love." 

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