Today on the Showbiz Top 5:  Prince William and Duchess Catherine perform their first Royal duty since the marriage, and meet with President Obama and First Lady Michelle.  Justin Bieber and Selena Gomez head off on a romantic vacation to Hawaii, will they share a room?  Brad Womack and Emily Maynard are officially done after Emily returned her engagement ring to ABC.  World renowned boxer, Oscar De La Hoya, has entered rehab.  And lastly, more on the biggest breakup in Hollywood news... Maria Shriver has hired a private investigator to truly see what Arnold had gotten himself into during the course of their marriage.  Kellie Rasberry has YOUR Hollywood gossip! 


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