| http://www.w3.org/ns/prov#value | - One Direction will headline this year's iHeartRadio Music Festival and will be joined by acts including Taylor Swift, Ariana Grande, Ed Sheeran, Iggy Azalea, and Lorde, on the main stage at the annual event which will take place over two nights at the MGM Grand Hotel & Casino in Las Vegas on September 19 and 20.
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