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Avicii is going more than just a little bit rock n' roll on his next album.  The Swedish DJ plans to follow-up his hit debut True with a collection that includes guest spots from Green Day's Billie Joe Armstrong, Serj Tankian of System of a Down, Jon Bon Jovi, and Coldplay frontman Chris Martin. 

Avicii says he and Martin have been close ever since they worked together on Coldplay's latest hit single, "A Sky Full of Stars," adding that "Chris has been like a brother." 

Avicii is expected to release his still-untitled sophomore album later this year. 

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