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Beyonce is now also proving her star power on HBO.  The singer's intimate HBO documentary, "Life Is But A Dream," drew one-point-eight million viewers to the network Saturday. 

It was the largest audience for the premiere of an HBO documentary in nearly ten years.  The only other documentary to come close in recent years was Spike Lee's 2006 miniseries "When the Levees Broke," about the devastation in New Orleans after Hurricane Katrina. 

Beyonce's doc also delivered three times the ratings of the second season premiere of HBO's critically acclaimed Sunday series "Girls." 

Executive produced and co-directed by the Grammy winning singer, "Life Is But A Dream," offers up a look behind the scenes of Beyonce's closely-guarded personal life.  Highlights include footage of the singer's one-year-old daughter Blue Ivy; the star giving a toast at husband Jay-Z's birthday party; and her opening up about her strained relationship with her father and former manager. 

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