<http://schema.org/headline>
"Nicki Minaj, Lady Gaga, Alicia Keys Headlining &amp;quot;iHeartRadio&amp;quot; Music Festival"^^<http://www.w3.org/2001/XMLSchema#string>
<http://hiphopwired.com/2011/07/11/nicki-minaj-lady-gaga-alicia-keys-headlining-iheartradio-music-festival/>