Rockstar Post Malone Feat. 21 Savage Download 'Rockstar' on iTunes
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15 Celebrity Bromances We Just CANNOT Get Enough Of
They collaborated on THE biggest track of 2015 (and won a BRIT award off the back of it), so obviously Mark Ronson and Bruno Mars are total BFFs now. The one thing we want to know is, when's their next team up coming, eh?