Rockstar Post Malone Feat. 21 Savage Download 'Rockstar' on iTunes
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2013 In Numbers
When your first worldwide single gets over one billion views on YouTube, how do you even go about following it up? Well, that's the question facing PSY. The K-Pop star took the world by storm in 2012 - and if he wants to go one better, he's going to have to come up with something even more catchy than the infectious 'Gangnam Style'.