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"50 Things You Didn&amp;#039;t Know About Rihanna - Jay-Z doing the intro on &amp;quot;Umbrella&amp;quot; was kept as a secret from Rihanna."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.complex.com/music/2013/06/50-things-you-didnt-know-about-rihanna/jayz-umbrella-feature-kept-a-secret>