SiriusXM last week debuted a new song countdown radio show based on popular music videos from YouTube hosted by YouTube star Jenna Marbles. The playlist is apparently based on a combination of YouTube data and SirusXM curation. While this effort partly reflects the ever-growing importance of YouTube to music, it also represents the gradual adaptation of new media (YouTube) to old forms of presentation (top hits countdown shows). SiriusXM and YouTube first announced The YouTube 15 in late June stating that the weekly radio show would feature the "top emerging and breakout songs based on YouTube data of the previous...

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